Yes, certainly the IMG file dated 30 May 2025 on the card is corrupt. You'll have to re-format the card if that file also won't delete (sometimes a bad file won't copy but can be deleted). Note that it's likely to be a partial map of EU on the card with the rest of it on the device so it's possible you only have two bad detail IMG files.

Of course, there has to be something on the nuvi itself which caused it to not boot correctly even when the card was not in it. Look also for any other files of recent date and if in doubt don't add them back with all the older 'presumed-good' files. Ensure you have File Explorer options set like [Only registered and activated users can see links. ] because the .System folder may be currently hidden from you. A recent detail map in the .System folder may be the culprit. Ignore gmapbmap.img as a suspect because it never gets updated by GarminExpress. However gmaptz.img, gmapdem.img and others are possibilities and anything named gmapsupp.img or gmapprom.img are prime suspects being as if they are present they're large detail maps and more likely than smaller files to get corrupted during download. Look also closely at all other files in that folder, and in its subfolders (JCV, ASR etc.) for any recently dated files and leave them out of your restore initially. There may be a folder named "Map" onboard too containing a detail map. Add things back progressively after you've loaded the original fw back leaving the most suspect ones out entirely because they can be replaced by GarminExpress (WU doesn't update your entitled maps, it only does software like fw, voices, etc.). The nuvi may indeed complain about "No detail maps found" on boot but it will still functionally boot up.

As you add each limited group of files and folders back, disconnect from PC and reboot the device. If it bricks you know you've added back a bad file and will have to start again with the Cure fw to get MSM back. If you follow the advice above leaving the most suspect files out entirely you'll likely be fine. You can also check individual IMG files with [Only registered and activated users can see links. ] under its Info tab or Details tab. It'll show an error there if you load a faulty or incomplete IMG file into it.