Nope, it's not even the season pass. I was giving such examples regarding the whales who want to look cool, but in reality others often only see the default skin if it's from past season.
The 60$ skin is their pay to play roulette to get a 1% to get said skin with increasing price to get next "prize"
Maps, warframes, weapons and skins will also likely be loaded as needed, so you'll probably start with 20GB but bloat to 60 as you play
Another trick I noticed playing CoD mobile is that they don't load every other player's skin, only the latest. So if your install doesn't have it, it only display's the default skin for other players. Which also mean that the skin you paid 60$ for in the last Season Pass is only visible by a few players.
I'm on Pcloud, server with rsync+rclone to move files from file system to cloud and use it as a unified file system.
The lifetime storage offer from pcloud has been worth it for me and I even upgraded it from 2 to 12 TB