Use VVV (Virtual Volumes View). The cataloguing is pretty slow if the disc has a lot of nested folders, but once done, searching is very fast. The database is a Firebird database so you're able to crack it open if needed.

Note: If you have blue Windata BD-Rs from about the 2015-2018 era, check them for defects now! I have multiple discs that are failing.

More on WinData and other low end BD-R brands:

• https://forum.doom9.org/archive/index.php/t-149108-p-2.html

Sometimes I can slowly copy all of the files using Dolphin or rsync, with minimal errors. Otherwise, use ddrescue:

snippet.bash

ddrescue -n -b2048 /dev/sr0 Output.img mapfile
ddrescue -d -r1 -b2048 /dev/sr0 Output.img mapfile
ddrescue -R -d -r1 -b2048 /dev/sr0 Output.img mapfile

• https://lira.epac.to/DOCS/gddrescue/html/Optical-media.html

• My Verbatim USB BD-R drive is pretty slow at this
• An internal LG 14x BD-R drive is a bit faster, but the bad sectors are going to slow it down a lot