Oh, I have LOTS of ways to create M3U files, I was wondering which ones have a good user interface and create a file that has good compatibility with other players.
PowerAmp Pro Beta is about my favorite interface, but it uses some wonky internal format for playlists and if you export the M3U, it is unable to edit it.
I understood your question, that's why I showed you what the playlist looks like when view in Notepad, ie it doesn't point to any local paths so theoretically it shouldn't have any conflicts with your devices. Whether it will or not is another issue
For instance this is a playlist I created with Foobar2000 and you can see that it is pointing to a specific folder so I can see why it would cause issues on other devices:
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\01 - Concerto No. 1 in B-flat Major-I.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\02 - Concerto No. 1 in B-flat Major-II.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\03 - Concerto No. 1 in B-flat Major-III.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\04 - Concerto No. 2 in B-flat Major-I Vivace.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\05 - Concerto No. 2 in B-flat Major-II Largo.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\06 - Concerto No. 2 in B-flat Major-III Allegro.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\07 - Concerto No. 2 in B-flat Major-IV.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\08 - Concerto No. 2 in B-flat Major-V.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\09 - Concerto No. 3 in G Major-I Largo-Allegro.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\10 - Concerto No. 3 in G Major-II Adagio.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\11 - Concerto No. 3 in G Major-III Allegro.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\12 - Concerto No. 4 in F Major-I.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\13 - Concerto No. 4 in F Major-II Andante.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\14 - Concerto No. 4 in F Major-III Allegro.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\15 - Concerto No. 4 in F Major-IV Allegro.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\16 - Concerto No. 5 in D minor-I.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\17 - Concerto No. 5 in D minor-II Fuga- Allegro.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\18 - Concerto No. 5 in D minor-III Adagio.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\19 - Concerto No. 5 in D minor-IV Allegro ma non troppo.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\20 - Concerto No. 5 in D minor-V Allegro.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\21 - Concerto No. 6 in D Major-I.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\22 - Concerto No. 6 in D Major-Improvisation.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\23 - Concerto No. 6 in D Major-II Allegro.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\24 - Sonata a 5-I Andante.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\25 - Sonata a 5-II Adagio.flac
C:\Users\redwn\Music\Handel - Conceri Grossi Op 3 (2007) [FLAC] {Harmonia Mundi HMU 907415}\Disc 1 of 1\26 - Sonata a 5-III Allegro.flac
Ignore the spelling mistake with Concerti