[Quoth]

I had terrible problems with Windows backups for decades. The total path can exceed what the backup SW can do, or even Explorer copy.

Also tape drives that claimed success and were later unreadable. Customers hated being told that every tape backup had to be verified, or it might not be a backup.
Zip drives, CDs and DVDs were all rubbish for backups.

USB sticks / SD cards can fade in a drawer, a regular HDD won't. An always connected drive, RAID 5, Mirror or Cluster isn't a backup, but high availability.

Amazon download filenames can have ":" in them as often they are the web page title. This is totally illegal in Windows, but "works" on Linux, till you try to copy via SMB (even to linux server). So now on EVERY download from ANYWHERE I check/edit the filename and usually shorten it if long.