Thank you for your post.
The ADC-212/3 has 32ksample buffer shared between the 2 channels when active. This means that the if writing your own software in Labview you are able to collect this number of data points. To do this I would advise looking at the examples provided and that can be downloaded by following the download link at the bottom. You will need to look at the driver routines in the help file to understand how to impliment your own programs.
In Picoscope you can increase the maximum number of points per trace by going to:
Settings | Options | Advanced
Increase the number of points to 32,000.
In Picolog when using Fast Block mode you can specify the number of points that you wish to get.