Sync your AYN Odin and Thor saves.

On Android, RetroArch's Cloud Sync reaches an HTTPS server like SaveSync from version 1.22.0 (November 2025). Earlier Android builds only spoke plain HTTP. Check the version in Main Menu, Information, System Information.

The APK from retroarch.com and the F-Droid build are 1.22. If you installed RetroArch from Google Play and Cloud Sync can't connect, install the retroarch.com build instead; it keeps its own folders, so copy your saves across first.

1. 1Create a SaveSync account, or log in with your Fastwater account.
2. 2Open Set up a device, give the device a name (such as "Steam Deck"), and press Make a key.
3. 3Keep the page open: you'll copy the URL, username, and password into RetroArch. SaveSync shows the password once. Each device gets its own key, so you can turn one off without touching the others.

1. 1In RetroArch, open Settings, then Saving, then Cloud Sync.
2. 2Turn on Enable Cloud Sync.
3. 3Set Cloud Sync Backend to WebDAV.
4. 4Set Cloud Storage URL to https://savesync.fastwater.app/saves/, with the slash at the end, then enter the Username and Password from SaveSync.
5. 5Leave Sync: Saves/States on. Sync: Configuration Files is up to you: it syncs core options and shader presets, which you may want different on each device.
6. 6Leave Destructive Cloud Sync off. RetroArch then moves a file to its cloud_backups folder before it overwrites or deletes it.
7. 7Leave Sync Mode on Automatic, then restart RetroArch so it does its first sync.

On a Thor, open the SaveSync dashboard in a browser on one screen and RetroArch on the other, and copy the password across instead of typing it.

Typing a URL and a long password with a controller is slow. Instead, with RetroArch closed (it rewrites its config when it quits), open retroarch.cfg (RetroArch shows the path, as below; edit it with a file manager) and set:

cloud_sync_enable = "true"
cloud_sync_driver = "webdav"
webdav_url = "https://savesync.fastwater.app/saves/"
webdav_username = "savesync"
webdav_password = "<your SaveSync password>"
cloud_sync_sync_saves = "true"
cloud_sync_destructive = "false"

Not sure where the file is? In RetroArch, Main Menu, Configuration File, Save Current Configuration shows its path.

RetroArch syncs saves by their path inside its saves folder. Two devices only share a save when the path matches, so check these settings in Settings, Saving on every device:

• Sort Saves into Folders by Core Name and Sort Save States into Folders by Core Name
• Sort Saves into Folders by Content Directory and the same for save states

The game's file name matters too: Pokemon Emerald (USA).srm only matches a ROM with the same name. Rename the ROM on one device if they differ. Use the same core for a game on each device as well, since a core's saves sit in its own folder when sorting by core name is on.

RetroArch syncs when it starts and when you close a game, not while you play. Close the game before you put a device down, and let RetroArch start on the next one before you load the game there.

If two devices change the same save between syncs, RetroArch skips that file and says "Cloud Sync finished with conflicts". To keep the copy in the cloud, delete the save on the device and sync again (in Settings, Saving, Cloud Sync, Sync Now). SaveSync keeps the 20 newest versions of every save either way, so you can restore one from the dashboard.

1. 1Load a game, save in it, and close the content to go back to RetroArch's menu. RetroArch syncs then.
2. 2Open your saves on the dashboard: the save is there, under the same folders as on the device.
3. 3On your second device, set up Cloud Sync the same way with its own key and restart RetroArch. Load the game and pick up where you left off.