I transferred all my old DATs (that I care about) to hard drives maybe 3-5 years ago. Tapes only dated back to 2000, so 15-18 years old. I don't run any checks on them for errors, but i don't hear anything to tell me otherwise. I always used Sony DDS tapes. Not "Actual" DAT tapes. Did any of you do that too? I had read/heard back in the early 2000s that DDS tapes were made in a sterile environment, and DAT tapes were not. And the DDS tapes were cheaper.