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So it initially works, then I used it on a Mac and unplugged it without safely removing it. Now on my Windows 7 Computer just displays a External Disk Drive and said it is not formatted.

Then I tried it on a Linux and it can display and manipulate the flash drive correctly. Is there anyway to fix my problem without re-formatting the flash drive? I don't think it would work. But SanDisk always have problems with their flash drives on my Win 7.

EDITS:

The data system is FAT32, but Windows doesn't seems to recognize. Model is: Cruzer Glide 32GB

Sometimes it would get fixed by rebooting my PC as some forum suggests, but this one wouldn't.

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What file system was the drive using? I have used dozens of Cruzers over the years, and I personal, never had a problem. –  Ramhound Dec 3 '13 at 14:16
    
You can paste the output of the following commands after connecting your USB Drive in Linux ? lsusb and dmesg –  bbalegere Dec 22 '13 at 18:16
    
I don't get why someone downvotes me, please explain? –  Daniel Cheung 2 days ago

1 Answer 1

Given the information provided, I'd say it's driver related. Copy/backup any data that's on the drive, reformat it using Windows, preferably using the windows defaults.

Cruzers are fairly generic. It shouldn't be having any sort of issue, even without safely removing from the Mac. Double check what OS version the Mac is running, then check if that version has cache writing disabled by default. If it is enabled by default, there may be some rouge bytes of data floating around your drive & causing problems. In that circumstance, a quick format should fix your USB drive.

There's also a chance that your Win 7 machine's driver store has some corrupt files & it's causing the problems. This theory is based on "...SanDisk always have problems with their flash drives on my Win 7."

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it is the newest Mac version. I don't see any new files written into it, or are they non-seeable? –  Daniel Cheung Dec 5 '13 at 11:41
    
"The newest Mac version" doesn't tell me much (Native to windows, minor experience on Macs & Unix). From the Apple Menu on the Mac, left click "About this Mac". The Build number should be just beneath the large "OS X". Slap that number with the words "write cache" into a search engine, and you'll be able to find out if write caching is enabled by default. What location are you referencing? The USB Drive, the Win 7 machine/its driver store, or the Mac? Assuming you mean the USB drive, the corrupt data bytes aren't viable because they aren't a file or folder. They're small chunks of data. –  Zach L Dec 5 '13 at 18:24

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