I am having an issue with a USB flash drive.

Hello, I am having an issue with a USB flash drive. I have a 2012 iMac OS X 10.9. Drive keeps on disconnecting after about 30 seconds. I tried to reformat through Disk Utility but doesn't allow me to verify or repair as it disconnects. This same drive works fine on Windows machines. I tried all USB ports but all give the same issue. Message is: "Disk Not Ejected Properly. Eject "No Name" before disconnecting or turning off." When I attempt to copy data from the disk it comes up with the message: "The Finder can't complete the operation because some data in "" can't be read or written (Error code -36)". I believe the solution for this error is to format the drive but as mentioned this function doesn't work. I need to copy data from a Windows machine to my iMac. Any suggestions with this is appreciated. Thanks!

I went back to a Windows machine, formatted it to NTFS (so lost the data but had a backup), recopied the data. Went back to the Mac but same issue happened after I tried copying the data "Disk Not Ejected Properly - Eject " " before disconnecting or turning off." One of the USB ports didn't detect the 32GB flash drive at all. And disconnected on another one.

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I am having an issue with a USB flash drive.

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