I show ~24.8 GB, and somewhere around 8k-9k files. Nowhere near 24k files.
+121GB for CHDs and +1.27 for .140 to .140u2.
BTW - am I the only one secretly happy about the recent MAME developer problems? I hate to admit it, but I really, really used to wish the releases would slow down - as soon as I'd get one set completed, they'd be several versions progressed beyond that. Always wanted far less frequent updates, rather than the ".138 to .138u1 changelog: modified Digdug's bloop from 6.121Khz to 6.122Khz" shenanigans. Please don't take this comment too seriously - probably without rapid releases, devs would get frustrated and leave, and I'd never want that.