[suramya_tomar]

The issue with CD/DVDs is that they degrade quickly over time. The CDs I burnt in early 2000s had tons of read errors when I tried restoring in 2022.

Personally, I think storing data on an external Harddrive is the most stable option. You can keep upgrading the setup as required and the bit rot is minimal.

I backup my data on multiple drives, along with redundant copies stored in multiple locations.

I have heard good things about Tapes as well but have no personal experience with them.