I just spent two hours tweaking PicoScope software settings with 5 MS captures, because no matter what, I could not get more than 1024^2 (1M) samples to the text formats.
Such an undocumented (is it documented somewhere?) feature is a terrible idea, I was just going to post a new problem topic to the forum when I by chance googled "picoscope csv maximum" and found this thread. Could you please indicate it more clearly in the save dialog, or add an option to Preferences to change this? I'm parsing the files in C so any limitations in Excel do not mind me.
I guess I'll take a look at the Matlab format then. If only I could get those two hours of my life back.