It's A Digital Disease!

The original post: /r/datahoarder by /u/LePoissonBanane on 2024-06-29 13:14:19.

Tech novice, looking to consolidate files (media, documents) from multiple sources (various old computer and external hard drives) on a single high capacity external HD (will back up with a second one). Essentially looking to take advantage of modern drive capacity for a physical office cleanup and consolidation. Maybe 10-20 Tb in total. Im wondering if there are any good software utilities that will reliably spot duplicate files and deal with that? Also, when copying data over from old HDs, how do you make sure it isn't corrupted and that it copies well? Any advice on this big one off project would be highly appreciated.