Steam Cloud Unable to Sync: What to Check Before Playing

What does “Unable to sync” mean?

Steam was unable to synchronize the game's local files with Steam Cloud. Steam Support says this can be temporary or caused by a network problem. The warning does not establish that the save is corrupt or that the cloud has your newest progress.

Keep the game closed while checking. Steam warns that ignoring the message and choosing Play Game can create a conflict between local and cloud files, potentially losing progress. If the dialog offers two versions to choose from, follow the Cloud conflict decision guide instead.

Check the device with your latest progress

Start with the computer where you last played successfully, especially if you have just switched devices.

1. Exit the game on that computer and keep Steam online.
2. Check the game's Cloud status in the Library. Wait for an active transfer to finish; an unresolved error is not confirmation that progress reached the cloud.
3. If you played offline, give that device a chance to synchronize after reconnecting.
4. Only launch on the next computer after the original device's synchronization completes.

Do not launch and save on both devices to “force” a repair. That can create two diverging versions. If the old computer still has the wanted progress, make a separate copy using the game's documented save location before changing files or selecting replacement versions.

Confirm game support and both Cloud settings

Check the game's Steam store feature list for Steam Cloud support. Developers choose the synchronized files; support does not prove that every save slot, mod or setting is included.

For a supported game, inspect both controls described by Steam Support:

Setting	Where to check
Global Cloud setting	Steam Settings → Cloud → Enable Steam Cloud Sync for applications that support it
Individual game setting	Library → right-click the game → Properties → General → Cloud synchronization

Client wording may change. A game without Cloud support may not show the per-game option. If either setting was disabled, establish which local progress you want before turning it back on when multiple copies exist.

Cross-platform compatibility is separate: Windows support does not prove that the developer shares compatible saves with macOS or Linux. See Steam Cloud file scope and device switching.

Check the connection if the error continues

Keep these checks targeted. They are possible causes listed by Steam Support, not proof of what is failing on your computer.

• Confirm Steam is online and that the connection is stable. Retry synchronization through the client if it offers that action.
• If the connection itself is unreliable, restart the router or modem and test again.
• Where practical, test a wired connection or another trusted network. A different connection can help distinguish a network issue from a game-specific issue.
• If errors persist, check whether a firewall, security product, proxy or another background program is interfering with Steam.

For managed machines or unfamiliar security settings, ask the administrator to inspect Steam's access. Do not broadly disable protection or delete local saves as a routine sync fix. If only one game fails while other supported games synchronize, include that observation when contacting the game's support.

Where is Steam's cloud log?

Steam Support identifies cloud_log.txt as the log of files written to or retrieved from the cloud. The default directories below are for the log, not a universal location for a game's active saves.

Operating system	Default log directory
Windows	C:\Program Files (x86)\Steam\logs
macOS	~/Library/Application Support/Steam/logs
Linux	~/.local/share/Steam/logs

If Steam is installed elsewhere, use its actual installation location. Inspect entries around the failed attempt and note the game, time and reported error. The existence of the log alone does not mean the transfer succeeded.

Before sharing a log, review it for account identifiers, local paths or unrelated information. Send relevant error details rather than credentials or an entire private directory.

What if the new computer shows old progress?

Steam Support says the newest file may still be on the previous computer if it did not synchronize successfully. Check that device before assuming the progress is gone.

If a conflict appears when it reconnects, compare the available file times with the sessions you actually played and use the local-versus-cloud guide. If the game does not synchronize saves through Steam Cloud, ask its developer for the correct manual transfer procedure.

Lost progress cannot always be recovered. Verifying installed files is a separate operation for installation problems; it does not recreate missing saved progress. Once sync is working, confirm the desired save in-game and let Steam finish the post-session transfer before switching devices again.