What is the largest USB flash drive size that the SM1 supports?

What is the largest USB flash drive size that the SM1 supports?

The SM1 I have has the 2.11 firmware installed. The 3D printing module and heated print bed are installed.

I bought a SanDisk 128gb USB flash drive to use in the SM1. It is formatted as MS-DOS (Fat 32). It contains just one gcode file. When I try to use it in the SM1 it does not recognize the drive.

I also have a SanDisk 256gb USB flash drive. It is also formatted as MS-DOS (Fat 32) and contains one gcode file. When I try it in the SM1 the blue files button becomes active but clicking on the button does not do anything.

I could only get the 128gb SanDisk flash drive to work in the new SnapMaker 2.0 printer.

Has anyone else been able to get larger USB flash drives in the original SM1?