My friend gave me his nexus 4 and never told me that the fone was rooted and its capacity..so now im confused, i check the custom recovery installed by pressing power+vol down and some sort of lying android logo shows and ask me what to do and at the bottom of the screen shows 'mako' thing..so now i check the unit how much memory does this phone has after restoring it thru recovery mode..i wipe cache aswell..so now i go straight to the settings and check it but it only shows 5.67gb total internl storage and 2.65gb free of space which is not normal to atleast 8gb nexus 4 has around 6gb less than 7gb internal and 5gb less than 6gb useable space.so the question is, how can i determine whether my fone is 16gb or 8gb even that i already had rooted it and i think he also put a custom rom aswell. i already search it and shows that some other nexus users getting the same problem or error as mine.btw im at kitkat 4.4 update
Here are my about phone screenies:
Sent from my Nexus 4 using xda app-developers app
Sent from my Nexus 4 using xda app-developers app
Only way I know to make sure is to format the data partition.. Can do this in custom recovery or fastboot OEM lock/unlock...warning you will lose all data, so backup.
Sometimes 16GB GB n4's get formatted incorrectly when upgrading os.
16GB should have @12GB free space and 8GB ones @5.7GB.
meangreenie said:
Only way in know to make sure is to format the data partition.. Can do this in custom recovery or fastboot OEM lock/unlock...warning you will lose all data, so backup.
Sometimes 16GB GB n4's get formatted incorrectly when upgrading os.
16GB should have @12GB free space and 8GB ones @5.7GB.
Click to expand...
Click to collapse
Ill try that one..that 5.7gb shows only in total internal memory and not the free space.and i notice also that theres alot of junks that when i did restore it thru recovery they were still there thats why they keep on eating up my space so i just did manually deleted form their folder using file manager..
When you boot into the bootloader using volume down+power you'll find a couple of informations at the bottom. One line tells you whether its the 8 or 16gb model.
Also some files on your storage (eg backups from recovery) may lead to faulty numbers in the storage section of the phones settings.
Sent from my Nexus 4 using xda app-developers app
Get an app that dispays all this info. Antutu will
Sent by reversed alian technology.
Is it possible to flash a wrong bootloader or rom mismatch to what my storage device is??i actually convinced that i have 8gb nexus like what u said is true..i saw in 'mako' at the bottom screen shows 8gb..
Sent from my Nexus 4 using xda app-developers app
Oxious119 said:
When you boot into the bootloader using volume down+power you'll find a couple of informations at the bottom. One line tells you whether its the 8 or 16gb model.
Also some files on your storage (eg backups from recovery) may lead to faulty numbers in the storage section of the phones settings.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Is it possible to flash a wrong bootloader or rom mismatch to what my storage device is??i actually convinced that i have 8gb nexus like what u said is true..i saw in 'mako' at the bottom screen shows 8gb..
Sent from my Nexus 4 using xda app-developers
Sent from my Nexus 4 using xda app-developers app
No. Software and hardware is the same, they just differ in the capacity of the storage.
Remember that your 8gb get reduced by the space needed for the system. 8gb doesn't mean you have 8gb free for usage. It means you have 8gb minus the OS, cache partitions, data partition. About 5gb should remain for generic storage such as pictures, music, video etc if I'm not mistaken.
Sent from my Nexus 4 using xda app-developers app
Heres what i found..got some screenies with what my bootloader is..anyone can explain what do i have here..im sorry from being noob..i know how to root and put some other custom rom but for this,i dont have any idea..i ask my friend how he rooted this and ask him every details he did but he dont even know how was that, maybe some friend of friends actually do it.im planning reverting back my nexus to stock rom/bootlaoder and like everything good as new..i dont feel the real nexus 4 here and got alot of problems too thats why..
sent from my N9005 using xda app-developers app
Now worst thing happen..im stuck at google logo now.. im not supposed to that format everything.. what im goin to do now.so any work solutions with this?flashing what files?need what?gggrrrr?thats why i hate rooted device.now my nexus seems to be useless now..
sent from my samsung E1200 lol!
Its hard to tell what the problem is. Did you do anything before the phone got stuck on the bootlogo?
In any case, if you're getting a used phone from someone else you're always better of wiping it completely and setting it up from scratch.
Sent from my Nexus 4 using xda app-developers app
amzkyz said:
Now worst thing happen..im stuck at google logo now.. im not supposed to that format everything.. what im goin to do now.so any work solutions with this?flashing what files?need what?gggrrrr?thats why i hate rooted device.now my nexus seems to be useless now..
sent from my samsung E1200 lol!
Click to expand...
Click to collapse
Lol damn dude you formatted everything? You really need to read the stickied posts. They are prerequisite reading.
Anyway, your first screen shot says 8GB.
When you format everything (I assume you formatted each partition), you lose everything stored on it. Everything. The OS is gone.
But all you have to do is install a factory ROM from adb or something similar. Let me go do a quick search and I'll be back.
Also, know that this isn't the phone or OS's fault. You went rogue and started doing stuff you didn't understand the consequences of. It happens, but it's nothing that can't be fixed.
EDIT: Here you go. Read through this guide. I can't reiterate this enough: read carefully and read to understand. This isn't literature class. You need to know what every sentence is telling you to do.
Basic summary: download 4.4.1 ROM for Nexus 4 and make damn sure you download the one for the Nexus 4 (mako). Install Android SDK. Boot into recovery. Specifics on these steps are located in that article. You will need to follow the link on how to sideload. Don't worry if you don't know what these words mean. The link is love. The link is life. It's written such that a young child could do it without assistance from an adult.
amzkyz said:
gggrrrr?thats why i hate rooted device.now my nexus seems to be useless now..
Click to expand...
Click to collapse
This is definitely assigning fault to the wrong party. Root isn't why you reformatted your storage and lost everything. It's because you didn't use Google to search for any of these answers. You could have solved your original problem by simply searching "How to tell nexus 4 8GB or 16GB."
It's possible that the internal storage was improperly formatted during a ROM flash, but it wasn't. I still can't understand what the hell your original post says, but I'm pretty sure you just misinterpreted how much space would be free.
The solution to this is to FIRST acquire the ROM you want and know where it's located in your phone's storage. THEN format the offending partitions or flash a zip or whatever you need to do to fix the problem (I don't know specifics since I've not needed it, but I'm sure I could find it with Google). THEN you flash your 4.4.1 ROM and if you go, never to return.
So in case you run into any problems with your car, I highly recommend against trying to fix it yourself. It doesn't sound like you'd be very successful. If you do, you'll probably end up with a hunk of scrap metal or a far more expensive repair job.
So i was planning to start all over form scratch..like everyone else is suggesting.so i have a little question..
From 4.4 kitakat and im planning to flash a stock rom 4.2.2 downloaded from google,is it possible?or do i need to stick to 4.4 like what i already had before this things happen..?
I was actually reffering only to this thread http://forum.xda-developers.com/showthread.php?t=2010312,maybe i think the most easy way to flash stock.
sent from my samsung E1200 lol!
https://developers.google.com/android/nexus/images?hl=ja#occam
Get the 4.4 factory image, flash that. Either get the 4.4.1 update ota or download the ota and flash it.
Sent from my Nexus 4 using Tapatalk
For those people that help me out at my critical state lol..,I must say thank you so much..now my nexus 4 bring back to life,without u guys,I think I can't do it alone.thnkx to xda for bringing u up here.must end this thread now..like what my thread originally is I know now what my nexus real capacity.tnx
Sent from my Nexus 4 using xda app-developers app
amzkyz said:
For those people that help me out at my critical state lol..,I must say thank you so much..now my nexus 4 bring back to life,without u guys,I think I can't do it alone.thnkx to xda for bringing u up here.must end this thread now..like what my thread originally is I know now what my nexus real capacity.tnx
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
For those people asking what i did was, i use adb flashing tool and required .img file for nexus 4 kitkat 4.4 and voila..anyhows i use this thread the complete guide flashing stock rom and if u want there is also root option tutorials here http://forum.xda-developers.com/showthread.php?t=2010312 ..thanks efrant from that wonderful step by step guide..
learning from ur mistake is not a bad idea.
Sent from my Nexus 4 using xda app-developers app
8gb or 16gb???
I'm also a bit confused on what Nexus 4 variant I have. In AnTuTu, I have the following info:
Storage-Internal SD Card; 5503.5/5803.1 MB (5.37/5.66 GB)
In Fastboot Mode, I have the following info:
Product Name- MAKO
Variant- MAKO 16GB
I've tried different "fixes" and my internal storage always ends up with 5.67GBs. So, what am I to believe my phone should have?
I heard there's a bug in nexus kikat update about shrinking storage issues.u better stick to what fastboot details has. U may want to try do a data format and clearing cache to resolve the issue.
Sent from my Nexus 4 using xda app-developers app
clenceo said:
I'm also a bit confused on what Nexus 4 variant I have. In AnTuTu, I have the following info:
Storage-Internal SD Card; 5503.5/5803.1 MB (5.37/5.66 GB)
In Fastboot Mode, I have the following info:
Product Name- MAKO
Variant- MAKO 16GB
I've tried different "fixes" and my internal storage always ends up with 5.67GBs. So, what am I to believe my phone should have?
Click to expand...
Click to collapse
reboot bootloader
fastboot format cache
reboot back to system
ps:dont look anntut
just go to the apps tab in config. it will show used-free (space)
Related
I got a 32gb yesterday and it was 32gb..after today I just realize that my size capacity has went to 16 GB...for example...after factory reseting it shows up as free space of 13gb... All I did was flash userdata. IMG and cache.img with cwm recovery. Is there any way of fixing this?
Your sure you got a 32gb?
drcujo said:
Your sure you got a 32gb?
Click to expand...
Click to collapse
yep..when i checked i had 29gb free space and it showed 29gb on android transfer
now it says total space 13.05gb with 12.51gb free....
jarjar124 said:
I got a 32gb yesterday and it was 32gb..after today I just realize that my size capacity has went to 16 GB...for example...after factory reseting it shows up as free space of 13gb... All I did was flash userdata. IMG and cache.img with cwm recovery. Is there any way of fixing this?
Click to expand...
Click to collapse
The things you've flashed might of had the partitioning scheme in-mind of a 16GB device (which would mean the other 16GB would be unpartitioned and invisible.
You could probably try seeing if there are specific 32GB files you can flash though.
espionage724 said:
The things you've flashed might of had the partitioning scheme in-mind of a 16GB device (which would mean the other 16GB would be unpartitioned and invisible.
You could probably try seeing if there are specific 32GB files you can flash though.
Click to expand...
Click to collapse
trying to i just checked and im positive my n10 is 32gb.... my serial code matches the 32gb serial code
I have this EXACT same problem and I've been busting my a** off trying to find a solution to it. I did the same as you and flashed userdata.img and cache.img after a boot loop when I unlocked the bootloader (I did factory reset but it didn't have any impact and everything I tried didn't work, including re flashing the stock image). I've looked around on Google alot and was contemplating posting too but thought I'd do some more research first cause I had a similar problem on my HTC One X. Some solutions state deleting 'lost.dir' or the lost+found folder might help but this didn't work for me. 16gb has just vanished =(
Sent from my HTC One X using xda premium
bamboosensei said:
I have this EXACT same problem and I've been busting my a** off trying to find a solution to it. I did the same as you and flashed userdata.img and cache.img after a boot loop when I unlocked the bootloader (I did factory reset but it didn't have any impact and everything I tried didn't work, including re flashing the stock image). I've looked around on Google alot and was contemplating posting too but thought I'd do some more research first cause I had a similar problem on my HTC One X. Some solutions state deleting 'lost.dir' or the lost+found folder might help but this didn't work for me. 16gb has just vanished =(
Sent from my HTC One X using xda premium
Click to expand...
Click to collapse
Yeah...I can't do anything....I tried almost everything
I'm going to try and full wipe again, from within the settings. If that doesn't work, I might full wipe from recovery and if that doesn't work I might try to re flash the user data and cache.img. Just can't test it yet cause I set up all my data yesterday and I can't back it up since Macs don't read 4.2 devices natively argh.
Sent from my HTC One X using xda premium
bamboosensei said:
I'm going to try and full wipe again, from within the settings. If that doesn't work, I might full wipe from recovery and if that doesn't work I might try to re flash the user data and cache.img. Just can't test it yet cause I set up all my data yesterday and I can't back it up since Macs don't read 4.2 devices natively argh.
Sent from my HTC One X using xda premium
Click to expand...
Click to collapse
let me know how it goes!
I know n7 owners had this problem. Some 32gb owners flashed the 16gb n7 image and it repartitioned the tablet to 16 gb, I haven't looked for a fix but that may be a good place to start.
Sent from my Galaxy Nexus using Tapatalk 2
draco259 said:
I know n7 owners had this problem. Some 32gb owners flashed the 16gb n7 image and it repartitioned the tablet to 16 gb, I haven't looked for a fix but that may be a good place to start.
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
there isnt a 32gb image
AHAHAHAH! i finally fixed it!! i used the flash-all script in the nexus 10 factory image and it reformatted userdata back to 32gb! i am finally at peace!
Haha that's great to hear buddy. I know it's probably too late to ask now cause you have probably started to re download your apps and settings but do you think just flashing user data would work? The flashall doesn't work for me for some reason on my friend's mac.
Sent from my Nexus 10 using xda premium
bamboosensei said:
Haha that's great to hear buddy. I know it's probably too late to ask now cause you have probably started to re download your apps and settings but do you think just flashing user data would work? The flashall doesn't work for me for some reason on my friend's mac.
Sent from my Nexus 10 using xda premium
Click to expand...
Click to collapse
No I don't think so. Its supposed to reformat the user data.IMG position. Try using a windows computer or Linux computer.
Would love to do that on my Windows computer but atm I don't have access to one cause my laptop broke just a couple of weeks back. I may try to move the stock rom to my Nexus and flash it. Will see how that goes if full wiping doesn't work. Thanks bud and glad to hear your Nexus 10 is back to normal
Sent from my Nexus 10 using xda premium
bamboosensei said:
Would love to do that on my Windows computer but atm I don't have access to one cause my laptop broke just a couple of weeks back. I may try to move the stock rom to my Nexus and flash it. Will see how that goes if full wiping doesn't work. Thanks bud and glad to hear your Nexus 10 is back to normal
Sent from my Nexus 10 using xda premium
Click to expand...
Click to collapse
I think it will work on the Mac. U got to give it root permission so do sudo then the flash-all script. Make sure they're all in the same folder. In order to run it with sudo you should type sudo then drag the script into the terminal and enter. I'm not sure though if this is how you do it on Mac though
jarjar124 said:
I think it will work on the Mac. U got to give it root permission so do sudo then the flash-all script. Make sure they're all in the same folder. In order to run it with sudo you should type sudo then drag the script into the terminal and enter. I'm not sure though if this is how you do it on Mac though
Click to expand...
Click to collapse
would you mind clarifying this? Maybe a step-by-step tutorial on how to fix this issue? And how not to do i (prevent it)? I'm about to root my 32gb and now I'm worried I'll flash a 16gb image or something, is that how it happened?
Glad you fixed it, but any idea what caused it so the rest of us can avoid the pain?
Total space
jarjar124 said:
AHAHAHAH! i finally fixed it!! i used the flash-all script in the nexus 10 factory image and it reformatted userdata back to 32gb! i am finally at peace!
Click to expand...
Click to collapse
Can you verify what it says for Total space under:
Settings | Storage | INTERNAL STORAGE
I just did a full wipe and I got 27.26 GB (not 29)
Hi I have a problem with my Nexus 7 (32 gb wifi only version).
My son in his infinite wisdom decided to install ubuntu on the tablet.
I went to try and restore this back to the android version but all it did was to wipe off ubuntu itself
I then went on jayceooi.com and used the nexus toolbox to see if I could reflash the images etc.Howveer although all the files were downloaded I canot get the laptop to recognise the nexus itself (even though it sems to charge the tablet). There is no menu at all to check whether or not usb debugging is ticked or not..
Im now left with the tablet without no apparent operating system. At the moment all it shows is the green android with fastboot mode but when I hit start it says booting failed.
Could someone help please before I do any more damage and I brick it completly (although I may have already done so)
thankyou for any help
Use wugs tool in dev stickies and make sure right drivers are installed.
Sent from my Inspire 4G using xda premium
Gizmoe said:
Use wugs tool in dev stickies and make sure right drivers are installed.
Sent from my Inspire 4G using xda premium
Click to expand...
Click to collapse
thanks it mentions it being a root toolkit. I didnt actually want to root so is it still ok to use to restore back to stock android?
It can do more then just root
Sent from my Nexus 7 using Tapatalk 2
jswarb001 said:
thanks it mentions it being a root toolkit. I didnt actually want to root so is it still ok to use to restore back to stock android?
Click to expand...
Click to collapse
Yes it can do restore back to stock. Just follow the guide to unlock bootloader so it can flash stock image then just re lock bootloader. It covers the process in op.
Sent from my Inspire 4G using xda premium
Ok thanks all. Seemed to be doing everything ok but its been stuck on"waiting for your device to finish booting back up" for about 30 minutes now. It did say it would take 5 to 10 mins but should i carry on waiting or abort and start again do you think?
thanks
I would reset it see if that helped
Sent from my Nexus 7 using Tapatalk 2
If your son re did the partitions for Ubuntu that could have messed things up pretty good. I have only had my nexus for a few days so I couldn't tell you how to fix the formatting quite yet. I would search around on how to verify and correct the partitions if needed.
Sent from my Inspire 4G using xda premium
Hi, how will I be able to know which variant (8gb or 16 gb) my nexus 4 is?
Before rooting, I think my total storage capacity is 12gb+ (I actually can't remember definitely).
Then I unlocked the bootloader and tried to flash, I was stuck in the X logo, I restarted, then I was stuck in the google logo (unlocked bootloader at this point.) I had backed up my apps and sdcard via adb.
I was stuck, so I downloaded a factory image and reflashed my device. Then I rooted it. I was done. SU installed, and it was rooted. I then reinstalled my app settings via adb again, but not the sdcard.
after sometime, putting music, movies and apps, I noticed that my device only had a total of 5.66GB.
I bought it 2nd hand, BTW.
So what happened? Now, I just want to confirm really how much storage I have so I can get back my money if this was indeed an 8gb version instead of 16gb. Any ideas?
Thanks!
All of the media you put onto your Nexus 4 takes up room. How many movies did you put? How many songs? If you feel that there is something wrong with the amount if storage available, then you can try formatting your SD.
I also remember that there's a bug on 16GB models to only show 8GB.
Sent from my Nexus 4 using xda premium
there is a similar issue that occurs with the nexus 7. i remember it was talked about before in some threads. after flashing the images, did you do a factory reset or clear data in recovery? this seems to have the issue fixed. some units show up as 8gb after a reflash however a reset thru settings or clear data fixes this.
Do what thephantom said. Recovery must be stock though, not custom. If you need more help. I made a little how-to guide a couple months ago for this very problem: http://forum.xda-developers.com/showthread.php?p=35119185#post35119185
thank you guys... I'm relieved that it is a bug, I hope it is a bug in my case... One question though, do you suggest back up with adb + sdcard or titanium? my previous settings were not backed up using adb cmd (I'm not sure though, since I didn't push back the sd backup)
wakoko79 said:
thank you guys... I'm relieved that it is a bug, I hope it is a bug in my case... One question though, do you suggest back up with adb + sdcard or titanium? my previous settings were not backed up using adb cmd (I'm not sure though, since I didn't push back the sd backup)
Click to expand...
Click to collapse
ADB and SD card.
Sent from my Nexus 4 using xda premium
but won't it give me problems again if I did that?
wakoko79 said:
but won't it give me problems again if I did that?
Click to expand...
Click to collapse
You can even make a nandroid backup and apply it after the storage fix. Its in the OP of the thread I linked.
Sent from my Nexus 4 using xda premium
I accidentally wiped my internal storage and ROM completely from my device.
It was empty. I had to flash images available on the developer site. After managing to transfer files back onto my phone I flashed cm10.1 again.
Now I notice I have only 8GB storage.
Anyone else experience such an issue?
Sent from my Nexus 4 using Tapatalk 4 Beta
shockem said:
I accidentally wiped my internal storage and ROM completely from my device.
It was empty. I had to flash images available on the developer site. After managing to transfer files back onto my phone I flashed cm10.1 again.
Now I notice I have only 8GB storage.
Anyone else experience such an issue?
Sent from my Nexus 4 using Tapatalk 4 Beta
Click to expand...
Click to collapse
In stock recovery you have to wipe cache and dalvik, if that doesn't fix it do a factory rest to fix it. It may erase even your SD Card so back it up on cloud or pc first to be safe
If you were not lazy or stressed of what happened you could have always referred to our good friend Google. And it took me exactly I second to find the right answer for you. Also I've had the same issue when rooting and installing stock 4.2.2 but it took me also few second to repair the problem. So next time dont be shy and use search or Google
http://forum.xda-developers.com/showthread.php?t=2033692
Sent from my Nexus 4 using xda app-developers app
http://forum.xda-developers.com/showthread.php?t=2033692
[HOW-TO] Fix internal storage if 16GB now shows 8GB
U just need to 'fastboot flash data data.img' from the stock files
Sent from my Nexus 4 using xda app-developers app
Thank you all for your help and suggestions I will follow them. I did search Google to be honest but I believe the search I did was shallow because I was being extremely panicky as I had already lost everything on my internal storage. Thank you for understanding and helping.
Sent from my Nexus 4 using Tapatalk 4 Beta
I'm not sure if I'm just looking at this wrong but it shows I should have 13 GB of memory. Now what's confusing to me is that I barely used 5 gigs and now its saying I have less than three gigs of memory left. I did buy the 16 gig version. Can someone explain to me how come it showing this and if there is something wrong. Thanks
Sent from my Nexus 7 using xda app-developers app
Here is a much better pic sorry...
Sent from my Nexus 7 using xda app-developers app
Reformatting your internal will correct it.
Username invalid said:
Reformatting your internal will correct it.
Click to expand...
Click to collapse
I believe I tried that... I used an app lagfix and it didn't help... Is there a better app?
Sent from my HTC One XL using xda app-developers app
Reformatting through recovery.
OK thanks
Sent from my HTC One XL using xda app-developers app
cables2590 said:
OK thanks
Sent from my HTC One XL using xda app-developers app
Click to expand...
Click to collapse
Did you do a backup via recovery? Mine was the same as yours until I deleted the backup (after 4.3 was installed and running).
Sent via my Nexus 7, Amiga 3000 or HTC EVO 3D
Sent from my HTC One XL using xda app-developers app
phillip1953 said:
Did you do a backup via recovery? Mine was the same as yours until I deleted the backup (after 4.3 was installed and running).
Sent via my Nexus 7, Amiga 3000 or HTC EVO 3D
Click to expand...
Click to collapse
I'm not sure but I did format my data and it worked for me...
Sent from my HTC One XL using xda app-developers app
Is there a tutorial on doing this?
Sent from my Nexus 7 using Tapatalk 4
RodMyers said:
Is there a tutorial on doing this?
Sent from my Nexus 7 using Tapatalk 4
Click to expand...
Click to collapse
http://www.addictivetips.com/android/what-is-twrp-how-to-install-use-it-on-android-devices-guide/
Username invalid said:
http://www.addictivetips.com/android/what-is-twrp-how-to-install-use-it-on-android-devices-guide/
Click to expand...
Click to collapse
Not really.! I have TWRP installed. Not sure which selection or steps to do.
Sent from my SAMSUNG-SGH-T989 using Tapatalk 2
Go into TWRP Recovery choose "Wipe" -> "Format Data" -> then type in "yes" -> "go"
After reset is finished restart the phone normally. That's it.
Lost Storage
I had the same problem. Tried several different methods to try to recover my storage. I too performed a format from TWRP and gained my storage back.
Guys, I have this problem.
My wife has a N7 32GB. Some months ago, after flashing some roms, I discovered that the N7 only had 16GB instead of 32GB. But in the meantime I never had the chance to "reformat" data partition or flash a factory image. Wife didn't want me to fomat it!!!
Today, I was finally going to do that, flash a factory image, but discovered that the usb connector is broken!!! The tablet charges ok but when I connect it to my pc, it starts to constantly connecting/disconnecting to it. I tried 3 different usb cables and the same with the 3. I even open the tablet and tighten the usb port, because it was very loose, but even then it still does the same. So, I don't have any chance to flash or send commands via my pc. (can I send them via wifi?! )
Can I just go into recovery and format/wipe data?!
By the way, from all the stories that I've seen from this problem, on bootloader, mine says Flo 32G and not 16GB like most of them. Can a simple wipe data do the job?!v Hope so...
When I installed 5.0.1 on my 2012 N7, about 10GB of my internal storage mysteriously vanished (I was getting disk full errors with only 2-3GB of stuff showing up in disk usage) and wiping the userdata partition fixed that.
I really do not like how half the fixes for Android issues tend to involve having to wipe devices, especially considering how there is no simple built-in method to do complete and timely selective backups and restore. To get anything resembling that functionality, you need to unlock the bootloader, root the device, install SU and a third-party backup tool. (Doing backups with TWRP might be easy but it is not selective and editing the tarball afterward can get messy.)