Have you tried changing the USB cable or testing with a different computer? If your Media Player is detecting the files then it’s likely a configuration issue. Also check Disk Management for clues:
run the tool to analyze the drive ( the phisical drive seems OK the test pass in both case quick test and sectors test. No error!)
connect the drive on different PC (PCs with windows don’t manage to access the disk. the history changed with Linus pc: the drive is accessed normally)
In addition I try to follow your suggestion to use the Disk Manager.
It shows the drive with no error but with a null info at file system type.
Surely the problem is that windows have lost the information related to the file system type of my device, differentely by Linux that manage to understand in some way that the disk is an NTFS disk.
Probably a file accessed by windows with the drive characteristic and resident on same drive is corrupted!!!