PSA: All of your computer hardware is WAY FLAKIER than its manufacturers want you to believe. Data errors can and often do happen on read or on write, or even when data is just sitting there doing nothing.

Use a filesystem with DATA INTEGRITY and data scrubbing! And DON'T JUST DRAG-AND-DROP to copy files! Only use data copy commands that verify data integrity between the source and the destination, like rsync! If you don't, your data collection could look like this in a few decades!

Bit rot is real! Bit error on copy is real! Some modern computing platforms try to mitigate some these well-known issues but most won't validate on copy. Windows users, you most likely won't have ANY data integrity so you are hosed unless you take specific precautions. NTFS is unsuitable for long-term data storage.