Yes it is their pro plan. Unlimited storage, upload limit of 25 gigs per file. About $16 a months
Some of my multi-track recordings and the accompanying mix files easily reach 50gb, so I have to break down the fileset to something like TracksRaw01-12, Tracks Raw 13-24, Mix Tracks 01-12, etc. You get the general idea. I then zip the files into a single file and upload that.
I have onsite and offsite backups, so these are really for the house burned down and I've lost all my tapes storage. Cheap insurance for me.
The other thing I did was zip every show I've recorded and the split files, so I can send them to anyone via email with a link. It takes about 30 seconds to find the link and email it, so it is super convenient for me.