Simone Voltolini of Outsoft in Italy has been involved with preserving QL software for some time now and has provided regular emails to keep us updated on what has been preserved, along with a list of hundreds of QL programs he has been able to duplicate for preservation.
Using special software to dump the content of a cartridge to a preservable form (many microdrive cartridges are now at an age where they simply stop working largely due to the disintegration of th efelt pad in the mechanism), Simone has been doing a fabulous job preserving this for the day when there are no working master copies of anything.
Simone has produced an English language YouTube video showing how he goes about his work with the mDump2 and mDoubler4 software. The video is about an hour in length, so allow plenty of time. View it via https://www.facebook.com/groups/sinclaircollection/permalink/10155176458182457/https://www.facebook.com/groups/sinclaircollection/permalink/10155176458182457/