Shelf life of cards for archival?

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.

Hi @carduser,

Please contact the SD Technical Support team for the best assistance and troubleshooting:

Does that mean they’re not suitable for this purpose?

Are we not supposed to talk about this on the forums?