Another option, after you backup your files, is to put Porteus on the flash drive, it supports booting on UEFI systems. If your USB appear in Disk Management but it is not accessible, then it means that drive got corrupted or there is error in the disk. Some users may want to reformat their storage media by formatting it, however formatting is not permanently erasing and files could be retrieved after formatting flash drive. Here I assume your pendrive drive letter as G: Enter this command. Click on 'Start' ->Run -> Type cmd and press Enter. Is Formatting Deleting Files from USB Flash. Best answer: Try this 1 Check if the files are not in hidden mode. If you want to boot the drive on a UEFI machine, to a Linux system, the easiest approach, after you backup your files, is to download a utility named Easy2Boot and use to make the flash drive bootable and put a Linux system on it. Recommend: 8 Free Ways to Repair Corrupted USB Pen Drive. If you want the files on it you need to find a non-UEFI machine, boot the Linux system and copy all the files to the machine’s hard drive, reformat the flash drive to a format Windows supports, then copy the files from the hard drive back to the flash drive. So, the question is, what do you want to do with the drive.

Obviously your flash drive doesn’t have one of those formats, and since you say it has a Linux system on it it is probably formatted in a Linux ext format. Reading a USB drive on a UEFI system simply requires it be in a format Windows recognizes ie FAT, exFAT or NTFS.

Well, booting on UEFI systems requires the drive be formatted with UEFI support which obviously your’s wasn’t.

Pendrive not showing files