Samsung Galaxy Grand Prime Doen't Recognize microSD card - Galaxy Grand Prime Q&A, Help & Troubleshooting

My Samsung Galaxy Grand Prime doesn't recognize any of my microSD cards (I have three that work with all my other devices except this phone). I have it formatted to MS-DOS 16, is this the correct format? Before I accept that the connector is broken and file for a warranty replacement I want to try out a couple things.
One thing I was reading is to uninstall/install the microSD drivers from the Device Manager. However, I can't find the Device Manager...where is it located?
Another suggestions was to perform a Reset, and if that doesn't fix it, a Factory Reset. All I can find, as far as resets, is the Factory Reset. How do you perform this regular reset and what is the difference?
Then someone on Android Central said that the Android OS could be the problem. I responded to this guy letting him know the phone's running 5.1.1, but I haven't heard back from him. Is anyone familiar with this, cuz it doesn't make much sense to me.
If anyone has any other suggestions they'd be greatly appreciated.
Thanks,
-Adam

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S5 falsely reporting corrupt/unknown file system on external hard drive

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XT1644 No longer connects to any PC

I have been going nuts as of late trying to figure what happened with my Moto G4+. It was working fine, could connect to my pc no problem, then all of a sudden out of the blue, nothing. It only connects as a charger. I've checked it with different USB cables, different ports, even 3 different computers. Still will only connect as a charger. I've even tried it in recovery mode, still not recognized by any computer. I have not restored the phone as of yet due to a ton of pictures and whatsapp chats that I need to save. I have installed Xender to start to move some stuff off the phone, but I'm not too sure that a factory restore would help this. I have read that it could be a USB issue with the phone, either the port or the chip it uses itself. While I know I can replace the port, the chip is beyond what I have equipment for. I have turned on developer mode, and its set the USB mode to MTP by default, I've tried changing it to PTP as well, but the phone will only charge and is never recognized by the pc. All software and drivers have been updated, uninstalled thoroughly, reinstalled multiple times to no avail.
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Thank you again.
Provide some more info about what ROM you're running, etc... The more info you can provide about your situation, the more likely you're gonna be helped.
What ROM:
Stock? If so, what version and security patch?
Custom ROM? If so, which one and build date..?
I also have the xt1644 and don't have any issues whatsoever connecting to my Laptop, granted I run Linux on my personal PC. I also have zero trouble connecting to the PC's at my work which all run Windoze.
You mentioned you've tried connecting to your PC thru Recovery, so I would have to assume you have TWRP installed, no? If so, which version and by whom?
I'm running full stock room, no mods, build NJPS25.93-14-4, security patch of March 1, 2017. As for the recovery mode, that was the stock recover/bootloader. To where it should be raw adp mode. Even in that mode it is never seen by the computers I've tried. I can't install the newest security update because it won't mount internal nor external memory. I'm at work at the moment and if you need any more information, please let me know.
Thank you
rainfellow said:
I'm running full stock room, no mods, build NJPS25.93-14-4, security patch of March 1, 2017. As for the recovery mode, that was the stock recover/bootloader. To where it should be raw adp mode. Even in that mode it is never seen by the computers I've tried. I can't install the newest security update because it won't mount internal nor external memory. I'm at work at the moment and if you need any more information, please let me know.
Thank you
Click to expand...
Click to collapse
Did the factory reset work? As I'm suffering from a similar problem
Have not done the reset yet, still finding the best way to back up everything, plus finding the time. Will be doing it sometime this weekend though
I just did the compete factory reset, and as i feared, it made no difference. So all my data is gone (saved what I could) and will have to figure a way to get a backup phone working while I have to send off the phone for repair. At least it's under warranty.
I have the same problem. I didn't do the factory reset (yet), but you confirmed my fear, the factory reset won't fix it. Too bad my phone isn't under warranty anymore.
Did you send it for repair?
What was the problem after all?
My XT1640 seems to be falling apart. Bluetooth stoped working out of the blue. Can't read SD card anymore and now USB connection isn't working.
My apologies for not doing a follow up post. I was able to send it back to Lenovo and the replaced the phone so it's back up and running fine. If it's out of warranty, then I'm not sure what avenue you can take aside from maybe finding one that's got severe screen damage but a good non blacklisted board and change it out. Aside from that, I can't tell you what they found wrong with it. I would assume the usb chip may have gone out, but without knowing the fate of my original phone, I can't say.

SD Card Encryption - Any Solution ?

Hello All,
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It Is Not Fixed
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The only thing I have not tried is factory reset because it is a work phone and it will blow away all of the work apps and getting them restored will take weeks.
I cannot even try to decrypt the phone because it is Marshmallow 6.0.1 and decrypt does not work. You have to factory reset the phone to start all over.
I have decided to leave the micro sd card in the phone in the hopes that next OTA update will see it and apply some fix to allow it to work.
This Encyption stuff is really a doomsday. I have an identical phone slightly older but still a Samsung Galaxy S5 with Marshmallow 6.0.1 unencrypted and it takes the micro SD card with no problems and works great.
IF YOU DO NOT HAVE TO ENCRYPT YOUR PHONE, JUST DO NOT!!!
The encryption does not really work anyway. If you connect your phone to a pc and enter your password for the lock screen, all of your internal files are visible once you tap file transfer from the notification pull down.
So encryption does nothing beyond the lock screen. If someone can bust your lock screen password, they've got everything.

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I tried a factory reset and now I'm stuck.
I think it's called the FRP loop. It wants a Google account which was previously used on the phone but just loops when I give it one.
It isn't recognised when I attach to my computer.
I have searched and I found loads of ideas but nothing yet has fixed it.
The boot screen is unlocked so I can load something from SD card but I really need some help with what to load - a link would do.
Would appreciate it if someone could respond - but please bear in mind I am not experienced at this (but always willing to learn!!)

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