I've just cleaned up the Jolla according to my snippet above. I'll take it with me this afternoon where I expect a number of WLANs to be nearby and check if they have been added (to confirm my hypothesis, but not necessarily yours..
OK, in the end I didn't take with me, but if wasn't necessary. I just looked and lots of WLANs (precisely: 30) have appeared, each with the 3x24-byte files.
I guess you'd need lots (~ 7E6) of seen WLANs to fill 500MB (as OP reported). But with BTRFS and perhaps some bad optimization for small files, the actual disk space used can grow pretty fast (e.g. assuming 4Kb per file, seeing ~40000 WLANs would fill up 500MB of disk).
I guess you'd need lots (~ 7E6) of seen WLANs to fill 500MB (as OP reported). But with BTRFS and perhaps some bad optimization for small files, the actual disk space used can grow pretty fast (e.g. assuming 4Kb per file, seeing ~40000 WLANs would fill up 500MB of disk).