When I did this recently the max zip was 4GB- and that was only from doing zip64, regular old zip was 2GB limit. TGZ could do up to 50GB.
But these limits are weird because while file size limits do exist, they don't match Google's limits: 4GB is the limit for regular zip, zip64 has a limit of 16 exabytes. And TGZ's limit of 50GB shows that they they have the internal infrastructure to support building larger files too.
So, other than that most of their customers use Windows and they want to make takeout as annoying as possible, do they put that limit on it?
Gah, thank you. The drop down is one of those terrible ones with no scroll bar and only three entries so I have to do the ol 'scroll wheel and hope' to discover more options.
Only on TGZ files, not zip, which maxes out at 4GB. (This is not because of a file size limitation. The only way to get 4GB is through zip64, which has a file size limit measured in exabytes.)
For you and me, not a problem. My wife is a medical professional and would have no clue what to do with a TGZ file.
Also, the fact that they don't mention this difference- the UI is so poorly done that you can only tell that TGZ can go an order of magnitude larger after selecting it in one drop-down and then looking at the other drop down- is a sign of how Google wants to make this as difficult as possible.