My prior understanding and experiences with trial and error using cloud storage for my Rekordbox music library, which has over 4,000+ large audio files, with new ones added constantly, is that is wasn't very compatible with Rekordbox/Pioneer software. Pioneer also doesn't recommend it. Rekordbox does offer cloud storage these days, but it's the most expensive subscription they offer and hasn't been affordable for me.

However, thanks to your comment, my curiosity was sparked about the developments in recent year and I stumbled upon a few interesting threads. No doubt cloud storage has come a long way in recent years, and it has been a couple of years since I tried it. There were too many issues for my liking back then, but I think I'll give it another crack, possibly using a similar method to what this man below has suggested, I'll just need do some more research.

I also think it'd be a good idea to back up my music collection in a cloud service, as well as my on my external drives, even if I decide it isn't ideal to use as my main Rekordbox database, just so it's there as backup to prevent something like this happening again. I'm constantly on the move and am often in places where I don't get the good internet connection, so the later option may be a go-er for me. I honestly just hadn't thought about it for a ages, but this experience has been a good kick up the butt.

Thanks!

https://preview.redd.it/xdeyphbngw7a1.png?width=1662&format=png&auto=webp&s=fb40a8d4d5ace049317ec001db35402f3bdeecea