Create a vault folder in a local directory
Sign in to Obsidian Sync and enable Sync for the vault
Select the vault and choose the remote devices to sync with
Install Obsidian on the other device
Sign in to the same Obsidian account
Enable Sync and download the vault to the device
Use the synced vault on all connected devices
Alternatively, store the vault in a cloud-synced folder such as Dropbox, Google Drive, OneDrive, or iCloud Drive
Open that cloud folder as an Obsidian vault on each device
Ensure only one device edits the vault at a time if using third-party cloud sync
Keep attachments and plugins inside the same vault folder
Verify sync settings and file availability on each device