> I think the SysInternals DU utility is a nice free utility suited for
> this purpose, from the command line. It can produce CSV files
> (comma-separated or tab-separated) listing the full sizes of any
> directory branches up to a given level, under a given directory. I think

Thanks, that will do what I want!

> it is quite handy, and could be also used with Ctrl-Batch for tagged
> directories, appending the results to a single file (although you would
> then also have multiple CSV header lines in that file to clean up).

I don't need to do random directories, just all of them down to a particular level, which the -l switch will handle.

It's just a pity Ztree can't dump exactly what it's displaying on screen for the alt-K setting.