Basically, an I/O device error appears when Windows is unable to perform an input/output task on a drive or disk.
There can be many possible reasons for this error such as
1) Storage device plugged incorrectly
2) Drives Driver is outdated or not compatible with Windows
3) Storage drive letter already exists and now Windows unable to detect it
4) The drive you have connected might be physically damaged
Above are the main causes for getting I/O device error, now below I am sharing some fixes that you can try to resolve this issue.
1) Make sure that the drive is correctly plugged in
2) Go to device manager and update drives driver software and makes it compatible with Windows
3) Change drive letter
4) Check read/write head of the drive whether it is fine or not