Fallout 4 syncing data stuck at 99%

I think I have a solution here guys. After you let the sync reach 99%; press the Xbox button, then go back to the game, and press the "A" button. Wait five minutes. The game should proceed to the main menu. I lost my internet connection then, but that might
have been a coincidence. Let me know if this works, please, so I can stick it to Xbox and Microsoft. Ha ha. Good luck.

Microsoft fix this f***ing problem we pay out the *** for everything xbox related and your *** us over and it's *** fix this now.

This is a known issue for any games that have large game save files in the cloud. We've been reporting it like crazy for quite some time now. Some of the moderators in the preview program assure us that Microsoft know about it and are working on it. Yet
it persists and no official thread/announcement has been made publicly.

I have had this problem TWICE! First time because it seems that the latest patch (1.4) triggers a re-sync of your game data and, unfortunately, Bethesda game saves are quite large. The first time it happened my file was 1.7 GB even though I hadn't used every
save slot. The only way I managed to get it to sync was to uninstall the game, all DLC, and my game save (that is, uninstall all). I then only installed the main game, loaded it, the patch re-downloads, and then it begins syncing your data. It took 4 hours
10 minutes, but eventually it finished. Once it finished I deleted all but critical save points and reduced my save file to about 200 MB. I suspected that it wasn't the last time this would happen to me.

I then had an achievement in Hitman refuse to unlock (it's still not unlocked and it's been reported again and again). The worst advice in the world was to follow the steps to remove your profile, power-cycle console, and restore profile. Not only did this
fail to fix the achievement problem but it meant that now EVERY game on my console would now need to be re-synced with the cloud (removing your profile deletes all game save files from the console). It took about 3 hours this time to re-sync my 200 MB Fallout
4 with multiple, "We're unable to sync your data with the cloud just now" errors appearing and restarting the whole process.

All I can suggest is try the uninstall game method I outlined above, but I think that the problem got worse since (I never had the fail/restart happen the first time), so if you've still got a really large game save file then it might not be possible to
succeed until Microsoft fix the problem.

Looking around here and other places it seems that hundreds of us have been affected by this problem, but sadly Microsoft refuse to acknowledge it officially and/or provide any timeline to when it's going to be fixed if ever at all.

Another thing that you can try is to do a Hotspot Connection using your mobile phone, works every *** time I do it.

Thanks for replying

It didn't work for me unfortunately,

it start to sync but then stuck at 99% then it's says unable to sync your data just now.