Kodi playback stuttering when playing large files

[mcarlton00]

Have you checked if these devices are actually capable of playing these files, period? And if so, have you looked into Kodi's hardware acceleration?

To have smooth playback, you either need enough processing power to just do it, or hardware chips optimized for playback, in addition to software support to use those features. If the hardware can handle it but you haven't told the software to try, it's not surprising you're having issues.