Hi David
Lets see if we can unpack a few things from what you have said. (My B2 is an old style one like yours).
1)
Information on the old B2 shows 11,489 FLAC files, 372 MP3 files and strangely 52 WAV files (To my knowledge I have never used the WAV format)
When you rip a CD on a B2 the file format that is created for the ripped CD is "WAV" . Your B2 can play WAV files which are uncompressed (and large)
Using the front screen and the control knob you can select (Compression - Select FLAC, MP3-128k, MP3-256k or none (WAV). FLAC is default). So after you have finished ripping and the B2 is idle it will start compressing to FLAC (a lossless format). The fact that you still have WAV files means that either you have not left your old B2 idle long enough for it to finish or that these files are corrupt.
2) Have you run a Scan Disk on your old B2 recently? Please do so then "Save" the reboot the old B2 and confirm that the Old B2 still says "11,489 FLAC files, 372 MP3 files and 52 WAV files" [If there are different results STOP here and tell us]
3) if (2) went OK then can we please try a new Backup of the OLD B2. Please format the USB device you use for this backup {NOTE THIS WILL DELETE EVERYTHING ON IT!] using the Front display an Knob (Format USB A/C -
Formats USB drive in USB A/C - uses FAT32 - useful to convert a NTFS disk for use with B2 - WARNING deletes everything on the external device). Then (
Export to C -This is the recommended backup if you don't need JB7 compatibility. Does a backup of the entire music collection to the drive in USB C and is incremental for subsequent uses of Export to C. The music is organised artist->album->track. Use in conjunction with Import from USB A/C)
We Now should have a complete copy of all the stuff on your old B2 on the USB device. You could plug this into your PC and look at them all if you wish to.
4) If you are happy with step 3 then I would recommend reformatting your new B2's HDD [NOTE -all music will be deleted], again using the front display and Knob - (Format HDD - Reformats the internal hard disk - everything deleted - you will be asked to confirm. More thorough than delete music - [NB NAS must be stopped first]).
5) Using the Front display and Knob - then reload your music from the USB device - (Import USB C -Load music from a drive in USB C. Ideally the music will be organised as artist->album->track. (Used by iTunes for example))
If you time step 3 and 5 they should be similar.
Once the load is complete check that your new B2 is reporting the same file size information as the old), check that your NEW B2 is set to FLAC compression and then start a "compress NOW" to convert the remaining WAV files. once the B2 stops flashing press the "Stop" button for 2 seconds to save everything. Then reboot and see what it says you have as music.
Hopefully this will sort things out. However If all your old B2 musick does not make it to the new B2 (qand therefore by implication it is not on the memory stick then you have a corrupt file or two in your old B2 that may be causing problems) then we need to try and clean up your old B2. say by (Cleanup -Removes empty albums, hidden files and any files beginning with '._' (dot underscore). Run Settings->Scan Disk after.) or even more nuclear (Repair HDD -
Disk repair function. Can be used to fix persistent HDD Read Only but the recommended solution is to backup and reformat. WARNING Does not work on 2TB drive. May delete a lot of music) BUT before resorting to this come back and discuss things with this forum.
Finally in step 3 above please DO NOT overwrite an B2 backup that may contain a good copy of your music - you said you had your music on your PC for the Sonos (( "As well as the Brennan export facility I have also backed up the music files on the old B2 to an external hard drive using Windows and cut and paste. These files work OK with my Sonos system.")) - (I have this too done using the NAS function) - so you may have a complete good backup BUT please be careful. There is nothing worse than having to reload music from CD.
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Just as a second thought as you have a copy of all your music on your PC (assuming this is complete - have you checked in detail?) you could start NAS on your new B2 and simply cut and paste music from your PC to the new B2, skipping files where it finds these are already present.
Also your NEW B2 went into compression mode immediately after the import because it detected the 52 uncompressed WAV files.
Fred