USB ports stop recognizing external or flash drives during back up, dv7 2185 laptop

HP Pavilion dv 7 2185 dx, Windows 7 64 bit
After one of the updates over the last 7 months my computer lost the ability to complete a systems back up. The back up will complete about 25 percent (using external hard drive or flash drive, any of the 3 USB ports) and then stop. The My computer page will then not show free space info. for the drives like when it did when they were first plugged in. It's like the drive became unrecognized during the back up.

I AM HAVING THE SAME PROBLEM WITH THE SAME MODEL. I GOT THE SERVICE
MANUAL AND I'M THINKING TO OPEN IT AND SEE IF THERE'S SOME PHYSICAL BAD CONNECTION
INSIDE. BUT LIKE YOU SAID. IT'S ONLY THREE MONTHS OLD.!!! I DON'T WANT TO RUIN THE WARRANTEE.
BUT THIS IS VERY FRUSTATING. I WANDER IF TOSHIBA DOES THIS ON PURPUSE.!!! KEEP IN TOUCH AND
IF YOU NEED THE SERVICE MANUAL CONTACT ME AT [email protected]
THANK YOU.!!!!

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USB ports stop recognizin​g external or flash drives during back up, dv7 2185 laptop

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USB ports stop recognizing external or flash drives during back up, dv7 2185 laptop