WT1800E HIGH-SPEED and CSV file feature explanation

​HIGH-SPEED and CSV file feature explanation requested:

It appears that if you store an HSP file to RAM and try to convert it to CSV it reports an error unless I have a USB device in the instrument.

The CSV file gets written to the USB device and not RAM.

Is it possible to convert to a CSV file from RAM and have the CSV file go to RAM as well?
I Set the Store File Path, the File Path, and the HSP file path all to RAM but it still ignores this setting.

Is this a bug or intentional behavior?

Answer:
Manually Converting to CSV Format (CSV Convert)
You can convert the selected high speed data capturing data to ASCII format (.csv). This menu item appears
when you press File List to display the file list.
• When you convert high speed data capturing data on the internal RAM disk ([RAM-0])
A CSV file is created in the root folder of the USB memory device whose ID number is 0 ([USB-0]). An error
message appears when USB memory is not connected.
• When you convert high speed data capturing data on a USB memory device ([USB-0] or [USB-1])
A CSV file is saved in the same folder as the high speed data capturing data file that is being converted