Anecdotal, but I have some Fuji blanks from the 90s that still burn just fine (works great on old drives that hate modern "see-through" media). The DVD-Rs I have were bought by my parents in the mid-2000s when they thought they were really going to move all their VHS to DVD The Hard Way, they bought like 500 Verbatim-branded blanks and used maybe 20. I have a few spindles of Verbatim archival CD-Rs and DVD-Rs, which are mostly used for sending customers backups of data. Those were bought some time before 2015 and work fine. One would sort of expect that, though :P I also threw out most of a spindle of IIRC Memorex that came in some lot of something else that looked like it was maybe 5 or 6 years old. Ended up with some still-wrapped Sony blanks from the 90s (I think they were rated for 2x burning!) that were totally eaten up, something attacked the metal layer. They came with a bunch of other CDs (burned and pressed) that were all fine, so I assume it wasn't storage conditions. Thanks, Jonathan