Bit rot is a form of data degradation. The files you created and copied to your storage medium (HDD/SSD/USB/etc) may not last forever. The previous music you painstakeingly ripped and tagged over the years will get corrupted over the passage of time.
Read the
bit rot article for a primer, and test if your files are affected by this phenonomen.
Quote:Click to read Bit Rot, And How Important Is This For Audiophiles
Download the testflac module (refer to the
Bit Rot article page 12 for usage instructions):
testflac-1_0_1-generic.fw (Size: 656.29 KB / Downloads: 9)