I recently backed up some data from PC1 HDD on PC2. Connection of HDD2 was using power cable of PC2. PC1 was switched off and rebooted a few times so I think that may have had something to do with the problem.
Upon copying the backed up data back from PC2 to PC1, a number of folders were inaccessible totally. chkdsk was loads or errors and went through files 30000 to 100000 fixing errors. This made the data accessible but the problem is that
1) some files e.g. music is not as it should be, like chkdsk tried restored the wrong music to the wrong file, so music played is not the same artist as the file is labelled.
2) some file are totally inaccessible
The problem seems limited to multimedia files and I have tested the files on >1 PC so (although error messages suggest codecs etc) its not necessarily codec related.
Is there any other cause or solution to this?