File system error when trying to create Secure Erase USB flash drive

I am trying to format a 240 GB SanDisk SSD Plus.

I have a 128 GB SanDisk Extreme USB 3.0 flash drive.

I am trying to use SanDisk SSD Dashboard to set up bootable Secure Erase software on the USB flash drive, so I can format the SSD.

I have formatted the USB flash drive via. Windows 10 (FAT32) and Rufus (FAT32) but SanDisk SSD Dashboard keeps stating:

The file system format on the USB drive is not supported. Please format your USB drive with FAT or FAT32 and retry.

Any ideas?

Hi kingmustard, 

Can you try another USB device ?