You can fix the i/o device error USB flash drive by checking a hardware connection, running the chkdsk, checking the drive for bad sectors, and changing the transfer mode in IDE channel properties. Also, you can access the data stored within the USB drive using recommended Data Recovery Tool.
When the request could not be performed because of an i/o device error USB external hard drive occurs then no file can be edited or transferred anymore. Also, the file and the data stored on a USB drive are at great risk of being lost permanently.
But since you have visited this webpage then I must say that you don’t have to worry at all. Because this post contains 9 working fixes to troubleshoot device i/o error USB drive and recover data from USB drive easily.