Welcome to the forum.
Saving files via the webserver Instrument Control feature is conceivably even easier than SCPI.
Enter Instrument Control and top right is a small vertical blue bar, click it to expand the webserves version of the front panel controls and below them is another set of virtual buttons that are shortcuts to take advantage of the fast DSO to PC connection.
The one you'll want is
Waveform Save which instantly dumps a .BIN file into your PC browsers download folder.
Mostly we want such dumps as a CSV so the next button along titled
BIN to CSV tool drops a little app into your browsers download folder too.
Install this tool on your PC and run all BIN captures through it to be converted into CSV's so you can further process them as required.
Once set up to do a BIN capture and convert it to a CSV the time required is far less than it took me to write this post.
Have fun.