I had the same problem for weeks and I couldn't figure out why it would work on my personal laptop but not my work PC. My problem was that the Flash drive was using 'H:' as the drive letter and I already had 'H:' assigned to a network share. The computer obviously recognized it because it appeared in the Disk Management, but it was assigned to H: and the PC already had 'H:' connected to my share. I could have just changed the drive assignment for the flash drive to another letter and restart the PC as previously mentioned but I was in the middle of working on something and restarting my PC wasn't the best thing to do at the time.

I decided to try to disconnect my 'H:' network share and reconnect it using a different drive letter ('J:' in my case). After doing that I reconnected the flash drive and it opened fine under 'H:' Just another option to look into. Xopher had it right about the conflict between Letter Drives already assigned to a network share, and what the Sandisk U3 can see, which is only the local drives. I have a bunch of Compact Flash and SD drive assignments that were taking up letters between D and G, and our first network drive is H, so I did a drive letter reassignment of the Sandisk using Disk Management in Windows Admin Tools (set the Sandisk U3 to 'M', which was the first unused letter and then everything ran fine. U3 set the actual thumbdrive to 'N'. It would be nice if U3 could test for network shares and then select a drive letter that was unused that FOLLOWED the shares but maybe that's too much to ask. Hantech Siso Markus-800 Manual. I've read all the answers to this ( Sounds like a load of Guess work to me).

Here is how to fix this problem quickly and easily. I have a EMTec 32Gb flash drive, which every time I plug it in window's doesn't recognise it. Hierarchical Datagridviewrow. The fix is very easy and it works every time.

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