partition mounted at /home is 250+ GB, but all apps and fs analyzers running on /home say it is only 62 GB "apparent size". Any ideas before I nuke the partition?

• Pop!_OS 22.04
• on a 500GB SATA SSD
• separate partitions with ext4 fs for the root and /home partitions.

I have Googled a lot, resized the home partition and filesystem a few times (from a liveboot USB) and run various analyzers but the problem persists.

Some output:

pop-os@pop-os:/media/pop-os$ sudo resize2fs /dev/sda3
resize2fs 1.46.5 (30-Dec-2021)
Please run 'e2fsck -f /dev/sda3' first.

pop-os@pop-os:/media/pop-os$ cd a358cafe-a2a3-46a4-ba33-0a82e88fb157/ && sudo ncdu || cd ../
pop-os@pop-os:/media/pop-os$ sudo lsblk /dev/sda3 -o size
 SIZE
 271G
pop-os@pop-os:/media/pop-os$ sudo e2fsck /dev/sda3
e2fsck 1.46.5 (30-Dec-2021)
/dev/sda3: clean, 264256/17768448 files, 8195768/71048094 blocks
pop-os@pop-os:/media/pop-os$ df -h --out=size a358cafe-a2a3-46a4-ba33-0a82e88fb157/
 Size
 266G

ncdu, du show 62 GB and Steam says similarly that there is no space to install games.

When I resize the partition and filesystem, it does show less remaining size. Resizing back to 290 GB, the max is still ~62 GB total apparent space.

Any ideas before I nuke the partition and move my data into a fresh one?