If your Google quota looks to be filling up, and you’re considering buying more space, check your usage first.
Drive and Mail has Trash folders, but they count against your quota. Drive doesn’t automatically delete things either. I found 3 year old cruft in there. YMMV
See your Google usage here:
Drive Trash is here:
GMail trash is here
Alternate accounts will be /u/1, /u/2, etc.
Jumbo non-trash emails are here:
Videos and Movies in “Photos” are here:
You cannot sort Photos by size,
but you can find them in your drive, sorted by size here: