Is writing to flash drive always in "mass USB storage mode"?

I am trying to display JPEGs on my HDTV using a MEDIAGATE M2TV 1080P Media Player. I have written JPEG files to a flash drive and connected the flash drive to the M2TV Player, which doesn't recognize the USB flash drive. The M2TV manual says that only "mass USB storage mode is supported". Are there different modes of storage? What do I get from my mini? Also I assume that my file system is HFS+. Correct? Thanks for any help.
Owen

Mediagate are the people to ask if things aren't working. The questions should be about the partition table (Apple has a couple) of your flash drive (possibly the brand) and the format. (In-camera flash storage has, as you read in the Wikipedia, it's own, unique partition table.) Flash drives probably come from the box with no partition table, but only one partition (volume) formatted in FAT32. This default is rarely changed by people; so that should have worked.
The question is how to transfer your JPEG photos from a Mac hard drive to a flash drive. Only now is it occurring to me that they may just mean their box captures JPEG files and transfers then to your Mac's USB port in USB MSC protocol, not USB PTP.
My ignorance may have confused the issue more. I last studied JPEG when it was released . There was room in the file for EXIF data. However, I doubt they anticipated GPS data and more, which Macs could interpret as metadata (as they do 'keywords'), and require USB PTP protocol to transfer. Well, this is wrong.
I borrowed a JPEG photo with a huge EXIF file, containing GPS data, and changed the suffix to .TXT, opened it in TextEdit, saved it, and dragged this non-photo file (using, presumably, USB MSC protocol) to a flash drive formatted HFS. I then changed the suffix to .JPG and opened it with the Finder. Its size hadn't changed, and its EXIF data hadn't changed. So, PTP is a mystery to me: I don't know what advantages it offers, though I choose it on cameras. Perhaps Mediagate can explain it, since it's the preferred protocol for transferring photos.
If you really need to copy a photo to a flash drive in USB MSC protocol, you can always change the suffix to .TXT and back. Perhaps someone more knowledgeable can help. (I'm unfamiliar with your device.)
Best of luck.
Bruce

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Is writing to flash drive always in "mass USB storage mode"?

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