Datalogging to CSV file on USB

Datalogging to CSV file on USB
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  • HMI Model: cMT-3072X
  • EasyBuilder Pro Version: V6.08.01.614

I have followed the video instructions here:

When doing the offline simulation, it works as expected. When I load it onto the HMI however, it does not generate files on the USB. Neither accessing via FTP, nor pulling the USB drive out and connecting it to a computer shows any data on the USB drive at all.

This form won’t allow me to attach the cmtp file.

I do have the screen set to allow FTP to modify USB/SD card data

What do I need to set differently on the screen to get the csv output working?

Hi @jjansen,

Please confirm that your USB drive is in FAT32 format as that may be the issue. If you’re having problems exporting after that, please reach out to

From what I’m reading, FAT32 is only usable on drives up to 4GB. I have a 60GB drive for testing and an 8GB drive for production.

exFAT didn’t seem to work either. Do I have to partition the drive down to 4GB?

Hey @jjansen,

4GB is the maximum file size for FAT32 format. The maximum FAT32 drive size is 32GB.