Switching from Joplin to Obsidian

Hello everyone

I'm trying to transfer my notes from Joplin to Obsidian. They have migrated, and many notes have attached files. These files open normally on the computer, but I can't open them from my phone. Between my phone and computer, I use the Remotely Save sync plugin configured via Dropbox.

When you try to open a file attached to a note from your ios phone, you get the error "you don't have permission to save the file ..."

Is it really impossible to view attached files in notes from your phone? How can I fix this?