No.
These are very small files - subtitles actually. Tiny designed to fit on a floppy disk originally.
I downloaded about 10 folders each containing a few thousand files - some folders were bigger.
I've always though the speed of the compression was a bit quick and wondered whether it happens...
If you are uploading thousands of files to box a word of advice.
I've just been downloading them for a work project and noticed something a bit odd.
Box allows you download a whole folder as a zip. Except I did a check and it can miss some.
So I advice you check what the site says and what...