@VintageDave
The device likely needs to load cure firmware to re-enable Mass Storage Mode so you can remove any corrupt files or as a last resort do a re-format. Read the two threads linked below:
[Only registered and activated users can see links. ]
[Only registered and activated users can see links. ]

Clearly the device can access preboot mode because G7ToWin only works to read devices in preboot. Usually devices that can access preboot can be cured.

Post again if you need more assistance. BTW, your device probably isn't getting far enough into the boot process to read from a card, in any case that file you inquired about [Only registered and activated users can see links. ] is for a device with a different problem, i.e. 'System Software Missing' permanently displayed. Yours is probably 'soft-bricked' which needs a cure fw loaded in the first instance.