Sorry to revive old thread, but this is really key information. I'm a new user of LB, so maybe this is well-known by the community, but this fixed my problem. Was scratching my head about BOTH mame's deviation from normal quote usage AND why LB still couldn't find CHDs even though mame.ini was correct.
Thanks @boohyaka and @neil9000
A killer feature for LB would be if it did check for CHDs for games which need them.
An interesting trend seems to be to convert everything to CHDs--such as playstation, dreamcast, etc. CHD format being internally compressed while supporting efficient random access of compressed data and now also supporting zstd. Over at Romvault everyone seems super excited at the prospect of using zstandard for everything, thus eliminating the hatefully slow LZMA, and moving towards CHDs for storage (MAME Redump dat set for example). It's strange to be saying this, but I think CHDs are the future?!? lol
Historically, CHDs seem to get treated as optional for those with large hard disks, but that's kind of old thinking perhaps--a complete Mame CHD set being only about 1TB and with new console rom sets coming out which are CHDs.
Would be nice to see LB able to notify of missing CHDs in a user friendly way, then being able to import them from a given folder would be even better. :)
