[GUIDE][CM9][HOW TO ESTABLISH - USB Mass Storage] - Optimus One, P500, V General

Hey,
too many users are still asking about theirs problems with 'Mass storage' so there is a small guide:
1. Download latest drivers 3.7.2. Someone can't find so there is a link
- LGUnitedMobileDriver_S4981MAN37AP22_ML_WHQL_Ver_3.7.2
2. You have to enable USB Mass Storage so where can I find this option:
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3. After that windows trying to install MTP drivers what is not working too much on WIN and therefore prevents installation of the USB MS driver so you have to delete some configuration file in:
C:/Windows/INF/
- wpdmtp.inf
- wpdmtp.inf
!BUT MAKE BACKUP FIRST!
After deleting those files windows automatically installs right drivers and you can use Mass Storage.

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I did this a few times and when I reinstalled the drivers again, it worked!
Remember to turn on usb mass storage from your drop down screen after the usb cable is connected.

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thanks mastershefis.
you mention some files but only list wpdmtp.inf, twice. typo? what is the other file?

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gugler said:
thanks mastershefis.
you mention some files but only list wpdmtp.inf, twice. typo? what is the other file?
Click to expand...
Click to collapse
The second file is wpdmtp.PNF. It is in the original post by mastershefis linked below.
Source

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..

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Nevermind

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isnt working for me, pc detects it but when i click computer> to find it no new "drive" is detected to brows the sd cards files.

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Doesn't work for me.
The box for USB mass storage is greyed and I can't select it. I have a p5110.

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Thanks
Thanks for posting your success story. It does help others, who are looking for confirmation. Thanks again. I am also facing the same problem and going to try this solution.
Thanks,
Joe
brownsmell said:
I did this a few times and when I reinstalled the drivers again, it worked!
Remember to turn on usb mass storage from your drop down screen after the usb cable is connected.
Click to expand...
Click to collapse
---------- Post added at 03:17 PM ---------- Previous post was at 02:30 PM ----------
Success !!!!!!!!!!!!!!
Thankssssssss a lot ... struggling to find a solution for this issue for such a long time ... Tried different things (different computers, different ports, PC Suite, Mounting USB Storage in Recovery, and Formatting SD Card). Nothing worked ...
Finally your solution worked. Reinstalled the latest drivers from the link you provided and restarted my PC ... USB connection prompt promptly appeared on the notification area ... gr8 help. Thanks for the link too.
But this works only when I connect my phone before starting the PC. If I restart the PC it works. If I unplug USB cable of the phone from PC and connect it back, it does not automatically recognizes. I have to restart the PC to get the USB related popup on my phone. Am I doing anything wrong ??? Your help would be appreciated.
Few Questions:
1. After trying all these; if I put the 2 files back on "C:\Windows\inf\wpdmtp.inf", will it cause a problem???
2. Will my USB connection work normally if I do so???
3. Without these 2 files, my Windows in my PC won't misbehave right ???
Please do reply. If I find the solution myself ... will try to post.
Thanks again.
Joe
mastershefis said:
Hey,
too many users are still asking about theirs problems with 'Mass storage' so there is a small guide:
1. Download latest drivers 3.7.2. Someone can't find so there is a link
- LGUnitedMobileDriver_S4981MAN37AP22_ML_WHQL_Ver_3.7.2
2. You have to enable USB Mass Storage so where can I find this option:
3. After that windows trying to install MTP drivers what is not working too much on WIN and therefore prevents installation of the USB MS driver so you have to delete some configuration file in:
C:/Windows/INF/
- wpdmtp.inf
- wpdmtp.inf
!BUT MAKE BACKUP FIRST!
After deleting those files windows automatically installs right drivers and you can use Mass Storage.
Click to expand...
Click to collapse

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spljoe said:
Few Questions:
1. After trying all these; if I put the 2 files back on "C:\Windows\inf\wpdmtp.inf", will it cause a problem???
2. Will my USB connection work normally if I do so???
3. Without these 2 files, my Windows in my PC won't misbehave right ???
Click to expand...
Click to collapse
Your PC will works normally without these files. but maybe I have solutions for you. Try to find in windows folder wpdmtp.inf and wpdmtphw.inf if you find it in other folder put them to the C:\Windows\inf and replace older ones.
I have Optimus 4X HD right now and I found in C:\Windows\inf inf file from LG which didn't worked so I replaced it those files what I found in other folder and it worked