If you intend to edit your save files, you generally fall into two categories: Casual (trainers) or Advanced (Hex editing).
Skill book/skill tree flags
If you'd like to get started with managing your files, let me know: diablo 2 lod character save files
Use a tool like Syncthing or Resilio Sync to host a peer-to-peer sync folder between your home network devices. If you intend to edit your save files,
A .d2s file is a binary file encapsulating a character’s entire persistent state relevant to gameplay and display. Key logical components: diablo 2 lod character save files