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can't connect to pc...usb device not recognized

hey guys.
i've been using the xoom for about 3 weeks now. i have the latest motohelper driver. i'm using windows 7 x64. i've been able to access and transfer files before no problem. I rooted over a week ago and also have had no problems moving files around. accessing the sd card from the pc has also worked.
now yesterday I send my wife to move a file over, and she tells me it's not working. sure enough, no matter which usb port on the pc I plug it into, or how i disconnect and reconnect the cable on the xoom, windows gives me the USB device not recognized message.
I've tried rebooting both the PC and the Xoom. i've reinstalled the drivers. i've enabled and disabled usb debugging on the xoom. still get the same message. under device manager it shows as Unknown Device. if I go and manually select the Motorola MTP drivers it tells me it can't start the device.
we haven't done any recent software changes on the PC or the Xoom. specially not within the last two days for it to go from plugging in just fine to USB Device Not Recognized.
any suggestions?
thanks.

Nexus 4 won't connect to PC.

Hello, i have a very weird problem. My nexus 4 cant connect to pc as mass storage device.. It worked fine like 4 days ago.. I dont know what happened or what else i can try.. Already tried: usb debugging on/off, factory reset, usb settings in storage menu, different usb port, NOTHING HELPED! There are another weird thing that i spoted is that it only charges through usb when i have nothing selected in storage>usb connections menu, as soon as i try to select mtp or camera it stops from charging and nothing happens. Same problem for AC charging it wont charge when theres mtp or camera selected, and only charges as USB... I'm confused.. Are there any ways to get it working again?

I'm having the same problem.. I've just installed Windows 7 64 bit but it sees my Nexus 4 like Unknown Device.. I uninstalling the drivers and re installing them using Nexus Root Toolkit but no result for now..:crying:

Do you have a ROM or anything installed? I know with PA its a problem at the moment at times. A little more info would be nice. I never had a problem with Windows 7. I'm on Windows 8 now and i had an issue at first with it not showing up at times. But it seems to be fine now.

Just go in
Settings,
Dev options (if you not have it go in phone informations and press many times in row the Build Number, this activate Dev options)
and Disable USB Debugging,
then reconnect your phone, and the computer will see it

USB debbuging isnt working. i have no ROMS, stock android 4.3. And yes, now im running WIN 8, previuosly had 7, the problem occured after installing 8 and trying to plug it in. Its not showing in my computer neither in device Manager. I doesnt make any difference with, or without it pluged in, the only difference is that it will start charging, but then again ONLY when i disable everyting in storage>usb connections.

bump

do you have a fast charge app installed? it sounds like it's an issue related to fast charging via USB. if it's enabled you can't access anything on the phone via usb, but i think that requires to at least be rooted.

I'm on last PA 3.99-Rc1 and I just found out that if I go in Setting-Memory the appilcation shutdown .-. Never had this issue before .-.

Matteo Mazzu said:
I'm on last PA 3.99-Rc1 and I just found out that if I go in Setting-Memory the appilcation shutdown .-. Never had this issue before .-.
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Click to collapse
Nothing, just read that it's a issue with PA while using last Franco Kernel nightly XD I'm going back to windows vista 32bit, so I believe the problem connecting my nexus 4 won't be any more an issue (Going back to Vista because for daily use it worked perfectly and every thing worked fine with the drivers, Windows 7 it's better, but too many issues with drivers bla bla bla XD) :laugh:

I have always used the Windows Driver from the Google SDK (Google USB Driver- As of today, Revision 8) for my Windows 7 64 bit computer and have never had a problem. More importantly there is an Update Manager that comes with the SDK, that when you run, notifies you of newer Windows drivers as they are released. That way as Google issues newer OS builds or Windows issues a new OS, I know that not only my driver but my platform tools aka fastboot/adb/etc. (As of today, Revision 18.0.1) will always be compatible. The problem with these toolkits and driver downloads all over the place on these forums is that you have know idea how old the internals are. The other obvious thing to check is a bad or intermittently bad USB cable. Also make sure "MTP" is checked in Settings > Storage >Settings > USB computer connection.

Hey, I'm sorry if it's against etiquette digging up an old post, but this part worked for me:
pjc123 said:
Also make sure "MTP" is checked in Settings > Storage >Settings > USB computer connection.
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Click to collapse
Thank you so much, I had this problem for a long time before I found this thread.

dunni88 said:
Hey, I'm sorry if it's against etiquette digging up an old post, but this part worked for me:
Thank you so much, I had this problem for a long time before I found this thread.
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Click to collapse
Glad I could help. That setting isn't exactly the easiest thing to find.

Fix usb
Go to device manager in windows 7/8/8.1 . Connect your mobile with usb. You will see android device or adb right click on it, select properties, click uninstall driver. NOTE: When you click this a small popup will appear saying remove software driver, tick on it and click uninstall.. there you go ..it will reinstall drivers and your phone will be finally connected.

im having the same problem . My phone shows as Unknown Device on Device Manager. Tried other cables and usb ports. I can tell that the cables and ports are not the problem since my Nexus 7 can connect without problem. Tried usb debuggin on/off, MTP on/off, PTP. Still no luck. Already tried to reinstall drivers but still the same problem. Hoping this is not a hardware issue. I already tried factory reset and flashing other ROMs

My PC doesn't recognize the phone at all

Hello!
I have a Nexus 4 (currently running the latest CM12 nightly) and I have been struggling with this issue for a long time. I needed to transfer some photos on my PC and when I connected my phone I found out that the PC doesn't recognize it at all - it doesn't appear in the Device manager and I don't even have Other devices and/or Android devices as categories in there too. This was about a few months ago when my PC was running Windows 8.1. Before this issue occured I had no problems connecting my phone to the same PC, running the same OS and even in the same port. And also I was running CM nightly builds back at that time too. I started using AirDroid, but it's a pain the butt to transfer masses of files such as photos from there, because it takes a huge amount of time. So basically I have tried the following with no result:
Turned on USB debugging
Tried all of the PC ports and even a USB hub
Tried a different USB cable
Installed Android SDK
Deleted every single USB driver and reinstalled it seperately
Now I am running Windows 10 64x on my PC and it might come as a surprise, but the phone still is not being recognized at all. Yesterday I tried to connect it to a friend's PC and it was actually recognized and I could access i, but I need it to work on my own PC. I will be truly grateful if you could help me resolve this issue and I apologize if there has ever been such a thread in here, but I just made my account Thanks in advance and have a nice day.

heyitsbiscuit said:
Hello!
I have a Nexus 4 (currently running the latest CM12 nightly) and I have been struggling with this issue for a long time. I needed to transfer some photos on my PC and when I connected my phone I found out that the PC doesn't recognize it at all - it doesn't appear in the Device manager and I don't even have Other devices and/or Android devices as categories in there too. This was about a few months ago when my PC was running Windows 8.1. Before this issue occured I had no problems connecting my phone to the same PC, running the same OS and even in the same port. And also I was running CM nightly builds back at that time too. I started using AirDroid, but it's a pain the butt to transfer masses of files such as photos from there, because it takes a huge amount of time. So basically I have tried the following with no result:
Turned on USB debugging
Tried all of the PC ports and even a USB hub
Tried a different USB cable
Installed Android SDK
Deleted every single USB driver and reinstalled it seperately
Now I am running Windows 10 64x on my PC and it might come as a surprise, but the phone still is not being recognized at all. Yesterday I tried to connect it to a friend's PC and it was actually recognized and I could access i, but I need it to work on my own PC. I will be truly grateful if you could help me resolve this issue and I apologize if there has ever been such a thread in here, but I just made my account Thanks in advance and have a nice day.
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Click to collapse
So, with Win 8.1, at one point, Microsoft via their Win updates pushed out an Acer ADB Device Driver which was complete sheet, and you had to roll it back to get it to work. I only vaguely recall the details, but sounds like you uninstalled them. Here is a thread on the issue: http://www.eightforums.com/drivers-...usb-issue-since-last-windows-8-1-updates.html
You might try downloading Wug's NRT, and going through the driver clean up and install steps and see if that fixes it. You may have some USB device which needs to be removed or failed. The Toolkit will walk you through the process. Also, remember on W10, you do not get an obvious pop-up (to the point I have questioned whether my device was detected), but if you click the Messages bubble in the bottom right of the screen and expand it, if it detects, it will tell you a device was detected.

Nokia 6 USB Driver

Hi. I am a Windows Phone transplant. I got my Nokia 6 from Amazon and I am connecting it up via USB to put my music collection on the SD card. When I connect, it mounts as a CD and there is a setup for what looks to be the drivers there. When I run setup, nothing happens. The computer is Win 10. When I took the phone out of the box (from Amazon US), I noticed that the Amazon preloaded app took me to the Chinese Amazon site. so I think that this version is based heavily on the Chinese ROM. Does anyone have a direct link to the USB drivers for the PC? The ones I have seen on searching all look very dubious.
It was pretty cool turning this phone into an Android powered/Microsoft Services phone.
thanks

The Amazon app is just configured for Chinese. You can select another language, just go to the link next to the flag, drop down box, find the USA flag.
For the USB connection, after you connect the phone to the PC, on the phone, swipe down from the top and you should see a notification "USB *****". The "****" could be PTP, charging, MTP, etc. You want to use MTP to transfer files to the phone.

I am using MTP to connect, but has I mentioned, The phone is opening as a CD-ROM on the computer where there is a setup program with Drivers on it and it is write protected. If I try to run the setup program that it presents, Nothing happens. It starts, and gives me the Admin make changes screen, but after that nothing. This is the drivers that I think need to be on my computer to mount the phone properly to transfer files.

Mine did the same but as the previous poster said change it to mpt on the phone then in file explorer Nokia 6 appeared and when I clicked on it both the internal and sd cards showed up and I copied my music folder directly to sd card
Sent from my SM-T800 using XDA Free mobile app

I have the same issue. I tried choosing the MTP, even PTP as well, from the USB options, but still no luck in seeing the internal storage of my phone. Maybe this is a Windows 10 issue? I tried connecting my phone on my windows 8.1 PC and it worked fine. Anybody has a workaround on this?

my phone always have a pop-up ask me if I want to enable file transfer when I connect to a pc, maybe check if yours have the same pop-up.
Sent from my TA-1003 using XDA Labs

Phone does not show as drive
When I connect my Nokia 6 via USB, I get a popup asking what i want to do (charge, charge and transfer and two I can't remember at the moment). It does not show up as a (USB) drive (i.e. it is not assigned a drive letter), but among the Libraries (like Downloads, Pictures, etc.). I see the CD-ROM drive with the USB driver setup as well, but I guess you only need that when the phone does not show up right away. (Maybe on older versions of Windows?)
I can write to the phone and the SD card. I have a 64 GB Samsung class 10 card, it writes at only 12 MB/s; is that normal?
When I clicked 'Properties' on the SD Card, I saw that it was formatted as FAT32, so that explains why I can't write large (>4 GB) video files to it. Shame. Does anyone have an idea if this is ever gonna change?. I tried formatting the card to ExFat, but then the phone just says 'incompatible file system' or something like that.

Can't get access to my phone data mother internal nor external
I am using MTP to connect, but has I mentioned, The phone is opening as a CD-ROM on the computer where there is a setup program with Drivers on it and it is write protected. If I try to run the setup program that it presents, Nothing happens. It starts, and gives me the Admin make changes screen, but after that nothing happens. Pls help me guy's......

I have the same problem on Windows 8.1 x64

Nevermind, I found the solution for my device, I can't guarantee it's the same for you.
Open your settings on your phone
Go to About Phone
Repeatedly tap on Build number untill a message pops
up saying that you're a developer now.
Go back into settings and open Developer options now
Scroll down and find USB Debugging and turn it on.
That's it, you should be able to manage your files now

Finally Nokia is making Andorid based phones now. Because Android is the kind of OS people need today. With tons of application choice.
You can download the ADB driver for your Nokia in this link:
https://dl-ssl.google.com/android/repository/latest_usb_driver_windows.zip

change your cable. That's what the problem is

Problem with Transferring files on my PC

Hi. I bought a Redmi Note 7 Global 32GB/3GB yesterday and I have problem with transferring files
When I connect my phone to my PC (win 10) via it's USB cable, a menu appears with 3 options on the phone:
*No data transfer
*File transfer
*Transfer photos (PTP)
No matter which one I choose, In all 3 situations a partition appears in "This PC" which is empty and there is no file or folder in it. When I commit to copy a file to it, this error shows up:
Cannot copy item
This device has either stopped responding or has been disconnected
I've no problem with my honor 3c (android 4.4) and other phones on my PC, Also they have MTP option which connects so fast and let me transfer all file and folders.
What should I do?

It's kind of weird because now the phone is recognized and working well via USB 3 but USB 2 still has the above-mentioned problem.
I also have an old pc which I have linux lite, Chalet OS, and lubuntu on it. surprisingly file transfer works on linux lite and chalet OS via USB 1.1 - 2.0.
Can anyone use file transfer on windows via USB 2 port?

Hey man, I just bought the same phone today, 32/3gb and global, when I tried to connect it the first time that happened and I got scared.
I researched a bit and did a few things, deleted the drivers and the device in windows 10 device manager, reinstalled them and factory resetted my phone, and now is working well. I think the factory reset did the trick.
I hope this helps you. Cheers.

Psicovirus said:
Hey man, I just bought the same phone today, 32/3gb and global, when I tried to connect it the first time that happened and I got scared.
I researched a bit and did a few things, deleted the drivers and the device in windows 10 device manager, reinstalled them and factory resetted my phone, and now is working well. I think the factory reset did the trick.
I hope this helps you. Cheers.
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Hey. Thanks for sharing your solution. So you've experienced the same problem. Did you test USB 3 before uninstalling drivers and resetting your phone?
Are you able to see your phone's content and transfer via USB 2?

aqua07 said:
Hey. Thanks for sharing your solution. So you've experienced the same problem. Did you test USB 3 before uninstalling drivers and resetting your phone?
Are you able to see your phone's content and transfer via USB 2?
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Hello, sorry for the late response, I hope you found a solution early, but if not, I used both USB 2.0 and 3.0 (I think that's what you're referring to) and it did not work, after the reset and unistallation of drivers, both of them worked. I also have to say that I was using the cable issued in the box where the phone came, I'm still using it without trouble.