ahh, I see, you meant in a matter of space on google drive in general, honestly I don't think it will ever go over 15GB.
My cards per se I storage on Amazon servers, it really is cheap, you basically pay for the amount of your date
when I upload штещ spreadsheets - google compresses the size, cause overall size is smaller
going back to spreadsheets - yeah, agree it's really convenient, I rate LIs inside the game (defined main and side LIs), if there're many of them - I divide them into Tier sub-groups and rate them inside the group, and then integrate them into the main rating as well, also no, I don't do male characters cards, couldn't care less
Also I do only lewdable chars and on a very rare occasion - nono-lewdable if they playa significant role in MC's story.
as for LI's details - I used to do it as well, parameters like Hair Color, Tattoo, Piercing, Milf (yes/not), Eyes (eyes are important to me
), body features, tsundere (yes no), twins (yes no - one of my kinks), issues and small notes from me in general. though after some time I got distracted by another stuff and stopped doing this. I stoped on 222 LIs, not that much hahah