Device ID Validation too stringent?

[AdamVenn]

Thank you for your super duper program! I used it with success, but I had to comment out lines 309 and 334 (validate device/parent device identifier) because the validation was a little too strict for my OS - my device ID was mmcblk0 and I think that may not have satisfied the regex. I don't know how this would affect other systems but if it won't mess things up, I would suggest loosening the validation a little.

Pop!_OS, System76 Darter Pro, using format-udf on an SD card