Currently when you import things from Roam - logseq will display images, but they would be still stored on Roam servers.
Which works, but is quite fragile:
- you can’t access those images offline
- if you were to close your Roam account those images will break
On import download and store any referenced images locally in the vault (optionally retaining a reference to the original nearby).
I think it can be a good way to handle any images pasted in/linked by reference anyway (or maybe prompt users on this?). As allows for graph to retain full offline capability and helps with link rot.