The oldest one was from february 1988 - as stated in the source code of what is probably my oldest "app" that survived on disk. (All of my C64 disks unfortunately were thrown away 30 years ago, when I was too young to imagine that it might be nice to have a look at the content today. There are still some handwritten basic lines of code in old notebooks from '86 that somehow survived and some sprite paintings...)
I discovered things that I completely forgot they ever even existed - you can imagine how I felt when all of a sudden I saw old paintings, code, school work, letters... I suddenly was a teenager again, sitting at my old desk! It surprised me how much I actually worked & created with my Amiga. In my memories I mainly played games or watched Demos
There are still about 300 disks to go, and so far I couldn't work out how to dump Amiga 1200 HD disks, but I don't worry about that, looking at the treasure I already secured thanks to your product! So, thank you again - your board is worth every penny!
(BTW: Nearly all disks that were safely stored the last 25 years in boxes and a rather cool environment could be read without any problems. About 30% of disks of the same age that were moved often and not stored in boxes had severe problems or couldn't be read at all, including physical damages of the disk itself.)