I decided to put some music on my Oppo phone and use the blue tooth connection to my hearing aids.
As a trial I've taken one of the 125gb micro cards from my Fiio X5 and put it on the phone.
That's fine. Over 3000 songs there in various formats. What I've lost is the collection stored as desperate albums as on the Fiio. Instead the default option is listed by name so I end up with all tracks starting with 01 followed by 02 etc.
If I connect the phone to my computer I can see they're all still there in their separate albums.
The only sort options I get on the phone is name as above, size and type.
I can see one long way round is to start a new card and name each track before adding track number.
I could live with a smaller card and less music but it's going to be time consuming.
I don't want to muck up what's currently on the fitted card as it'll go back into the Fiio.
Any ideas for easy work arounds appreciated.

You just need to download any music playing ap rather than using a file manager program.

BubbleUPnP may be a good option and is free.

If the files are on your android phone and you chose to use BubbleUPnP as a music player then the music and cover art should appear under 'Library' in Bubble on your phone. From there its just a matter of selecting music in 'Library' to go onto the 'Playlist' and playing.

It's also possible to play music files on a computer directly connected to a stereo (of course) and using BubbleUPnP as a control point on your phone and in that case sometimes it's often necessary to add JRiver Media on the computer as a Library Manager for the album art to show on the phone.

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Thanks for the help. Put Bubbleup on my phone and it did indeed sort out file problem. Couldn't get the music playback to go through my music program on the hearing aids though. It defaulted to another blue tooth link where I have no adjustments. The sound wasn't great and in the end decided life is to short to fart around with this so it'll be back to the Fiio and Grado IEMs which still work well for me.
Been listening with the aids under the Grado 325 again and the sound is fine but switching away from the microphone on the aids to straight Bluetooth is where it goes downhill.
I'm far from an audiophile but even I have a limit I don't wish to drop below.

Maybe settings adjustments?

Else, what bluetooth codecs are transmitter and receiver devices set for or even capable of?
Anything less than aptx, Apt-X of old, surely doesn't qualify for hi fi bluetooth these days.

www.startpage.com/do/dsearch?query=aptx

Phonak use what they call Classic Bluetooth. Not sure if that's good or bad.
I think the problem maybe the program that Bubble and the McIntosh mb20 I tried default to. If I play direct from file with Bluetooth I can use the music program which does have some adjustments and sounds about 200 per cent better.
I will keep Bubble in mind and if the audiologist can sort some things out will revisit it.

Bluetooth Classic is supported by version 4 and above, so shouldn't in theory be a problem, as most phones are now Bluetooth 5, or at least support Bluetooth Classic in dual with Bluetooth LE.

Interesting...

Bluetooth version 5 on my phone

So in theory should sync with the Classic version (BR/EDR) with no problem.

Let us know what the audiologist says.

Will do. A few days away yet.