When loading a world, a notification saying "Can't sync this world's cloud data with your device. Check your internet connection and try again" appears

For anyone still scared of the future of your minecraft world, I am happy to inform you that I have a simple fix that will likely make your current world sync to the cloud once again, just like it used it. Not only that, but it will make your world size dramatically lower as well, and you also won’t have to wait for the update to come out either.

Disclaimer: If you can’t even enter your world, this method will NOT work. This method is only for people who have large worlds that only save locally but do not save to the cloud.

1. Buy a realms subscription. You don’t need a credit card or actual money. I used entirely just Microsoft rewards which is free, I saved up enough points, and purchased the $3.99/month realms subscription on xbox (not the $7.99/month one). This may take a few days or weeks to save up enough points, but it’s actually pretty easy to do and it is definitely worth it. You just need to download the Bing mobile app, sign in with your xbox account, and to get points, just click a few buttons and search stuff in the app every day. Eventually, redeem a $5 microsoft gift card when you have enough points. Then on xbox, just purchase the subscription with your free money.

2. Once you have a realms subscription, duplicate your large, only-saved-locally world on your xbox from the worlds menu. Then, go to the Realms tab > Settings and eventually you should find 3 empty worlds in your Realms (labeled ‘New World’). Click on any one of these, then click ‘Edit World’.

3. In the empty realm world’s settings, go all the way down until you see the ‘Replace World’ or ‘Upload World’ button. Click this, and choose your duplicated world from earlier when prompted.

4. Once uploading is successful, you should be happy knowing your world is protected in a seperate cloud now! But we’re not finished yet. So next, download your Realm world, and it will appear in your regular worlds list.

5. This is going to be the scariest part, but I promise, once you do this, your world will be syncing to the cloud again like normal. Go into your original world’s settings (not the duplicated world nor the realm world - I mean the original world that you’re always playing). Delete the world. This is going to be scary and weird, but trust me, I have this massive world for 4 years that I’ve played almost every day, and everything worked out fine for me. If you’re feeling skeptical, do what I did: Upload two versions of your duplicated world to Realms, then upload your original world as well. So this way you have plenty of backups. I also went into the downloaded Realm world to make sure everything was exactly the same as the original. It was, but I encourage you to also do the same, just to be sure before deleting your original world.

6. Rename your downloaded realm world to your old world’s name, because it will have a different name by default.

7. Play the downloaded realm world, and save the game like normal.

8. Your world should likely be saving to the cloud again!!! If not, do not panic - mine didn’t either. You might have to wait a few minutes or even restart minecraft for it to work. But eventually, you should be left with an uncorrupted, much smaller world that syncs to the cloud again like normal. Note that this will definitely not work unless you do step 5 - trust me, I tried.

Note that if anything goes wrong after step 4, don’t worry - your world is always in Realms, so you can just redownload your backup at anytime.

It’s also worth noting that this method will not work if you can’t even play your world. Unfortunately, you will likely have to wait until 1.21.100.20 releases in order to play your world again. But once you can eventually play it again, try the steps mentioned above to make your world much smaller and sync to the cloud again. This is a proven method that works, because my world went from 2.5 GB to 98 MB after doing this. I’m still not sure what causes this issue but it might be that hundreds of corrupted saves accumulate in the cloud and the game lacks any features to clean up the corrupted saves, so eventually the world gets too big and can’t sync anymore. Uploading to realms seems to refresh and clean up everything, then deleting your old problematic world frees up all that space in the cloud.

Additional note: This is the only method that worked for me. For months, I have tried everything I could to fix this problem, and this is the only thing that reliably worked. I truly wish the best for anyone who has this problem. Please give this method a try if you can. Have a great day!

I didnt work for me either. I will try. 1.21.101 but the anticipated 1.21.100 fix did not fix my world loading or the Xbox cloud issue at all. I even deleted the game saves from my Xbox to force the system to download my cloud saves again and got excited when I saw my Xbox running a huge download that took about 10 minutes on a very high speed connection (my game inflated from 1.4 to over 2 GB during this fiasco) but I was finally disappointed by the “Cloud Save Failed” coming up again after all the time spent with Mojang support and the promised fix I waited for.

reddit thread many others having this issue:
https://www.reddit.com/r/Minecraft/comments/1kme3sr/thread_for_cloud_sync_failure_large_world/

Größe der Welt (4 GB)
– Xbox Series X
– Cloud-Welt lässt sich nicht downloaden
– andere Welten synchronisieren normal
– passiert nach Werksreset

Large Minecraft Xbox Series X world (~4 GB) cannot be downloaded from cloud – download fails immediately

Salutation:
Dear Mojang Development Team,

Description:
I am experiencing a critical issue with a Minecraft save on Xbox stored in the Xbox Cloud. The world is approximately 4 GB in size and has been built over several years by my children and their friends. Attempts to synchronize this world from the cloud fail immediately, before the world can be accessed or loaded.

Important observation:
If a world were corrupted, it should normally download successfully and only fail when trying to open it in-game. Here, the download itself fails, indicating a possible issue with cloud metadata or the synchronization logic.

Steps already taken (unsuccessful):

1. Contacted Microsoft/Xbox Support

Cloud storage confirmed to be working correctly

All other games synchronize properly

Written statement: if the download fails in-game, the issue is with Mojang/Minecraft



2. Contacted Mojang/Minecraft Support

Multiple replies, all standard texts

Statement: Mojang cannot verify or restore cloud worlds



3. Cleared local Minecraft saved data


4. Power cycled console multiple times


5. Factory reset Xbox, reinstalled Minecraft


6. Other worlds, profiles, purchases, and add-ons synchronize correctly


7. Cloud storage is sufficient



Additional information:

World size: ~4 GB

Contains years of gameplay and memories

Cloud upload previously worked without problems


Suspected cause:

Corrupted cloud metadata (manifest, signatures, container)

Mismatch between cloud index and local references


Expected behavior:

Download should start

If corrupted, failure should occur during load, not during download


Requested technical review / outcome:

1. Validate cloud metadata and manifest files


2. Check container structure and integrity


3. Technical explanation why the download fails before loading


4. Possibility for recovery (full or partial)


5. Forwarding to the technical engineering team



Thank you for reviewing this case.
Kind regards,
Tobias Ritzmann

Tobias, I was in the Same situation as you a lot of memories no help, no way to restore my game. I took a lot of the steps you did and it did not work. I did finally get my worlds back. I finally figured out a workaround after waiting and trying for months.

You'll need a PC and your Xbox and a USB flash drive, but it worked great for me and several others on Reddit when I posted the same fix there, I created a link with the guide on how do to this:

https://minecraft-xbox-cloud-save-fix.pages.dev/

I hope this helps you! I finally played my game again with my son after I almost lost one that we built for 7 years.

This bug just happened for me, it looks like it was solved a while ago but two days ago got reopened and I’m running into the same problem. I’ve tried all the work arounds and everything that other people have tried but nothing works. And it’s only happening to one world, and it won’t even give me the option to edit it and make a copy it just gives me the same “cloud sync failed, check internet and try again” someone please help, I’ve spent a lot of time on this world. Also I’ve seen stuff about the size of the world changing, but mine has stayed at the 343.4 MB.