25.3 GB. But I did buy an SD card at launch and, with the exception of some Mario Odyssey data, all my games, save data, update patches, etc are downloaded directly to the SD card. I got a 128 GB SD and with the downloading of Pokemon Quest and an update patch for Rocket League, my SD card's free space is 94.3 GB.
Funny thing is I haven't played Rocket League in 2 months, but it didn't change the storage data for the game to 0.0 MB. I played Bayonetta 2 for a bit last month and I played Tropical Freeze at the very beginning of May and the file sizes seem to have disappeared.
It's odd and it makes me wonder if there's a defect in my system :/ Which is a replacement for my launch Switch...it had a defective battery display that the repair techs couldn't fix.