What... 5G? I just checked mine and I have 30G in total. I didn't subscribe to anything yet tho.
Anyway, nowadays I use private SVN to store my projects & resources.
I use cloud services (like Netflix, OneNote, those cloud-based things) so I have no data locally. Game saves... are on the cloud. Photo, also on the cloud and I SVN'em.
I do have stuff in OneDrive, e.g. wallpapers, my tools, scripts & hacks, setting of VisualStudio, things I need every time I reinstall a Windows or reset my Android but those are small files.
I don't need a OneDrive subscription yet.
I use GDrive only for photo cause it's free (with some limitations). Other than photos, are all in OneDrive now cause it has OD-on-Demand and it's... really useful.
ps: I use Camera (one that can connect with my phone through wifi for emergency e.g. GF wants it) for photo instead of a phone, so I can backup anywhere / anyway I want.