Best memory for archiving, and how long might it last

[Orionaut]

Think flash drives, SD cards etc.

What is the most reliable memory for archiving. How long might it reasonably last.

Is there a specific housekeeping operation for "Refreshing" it periodically and might that help.

etc

 

[casual_eze]

whatever you choose, make sure you have at least 2 copies because nothing lasts forever. Anything should work reasonably well (SSD or SD card etc) as they wear out with continuous use usually.
If you let us know how much data you are archiving we can give a better answer