Most of the data in that digital fossils is movies from that bay with pirates, but I guess there's still much more than 100GB of self-produced information - message (email, IM, phone) archives, digitized drawings, RAW photos, source code, savegames and so on.
Obviously, one could sort out the trash and compact the rest (like extracting a 10KB patch from several-gigabyte OpenWRT source tree, or radically compacting photo collection by deleting bad shots) and fit into 3GB/yr quota, but that's a hard and - unless one really wishes to fit some storage quota instead of just buying another hard drive - mostly pointless work.