I make a lot of audio recordings, and I save them to SD cards from my phone or standalone audio recorder. I usually use 128GB cards, and I copy them to the PC when they get full.
I’ve been keeping the full ones as the backups, and buying new cards for the next set.
How long can I expect the data stored on the full cards I’ve set aside to last? When I Google it, some results say cards last 5 years, and one site claims they could last for 30. How can I expect them to last? Is this a reliable method of backing up my files? I’ve got several TB of data, overall, and I really don’t want to lose it.