Hello TristanoGGiuseppeJBP12R-7414,
Thank you for posting in our Q&A forum.
This problem is related to the transmission speed of the network, the size of the disk, etc.
Or the setting about staging area quota / staging folder size in the following links might be helpful.
How to Determine the Minimum Staging Area DFSR Needs for a Replicated Folder
https://techcommunity.microsoft.com/t5/ask-the-directory-services-team/how-to-determine-the-minimum-staging-area-dfsr-needs-for-a/ba-p/399439
Staging Folder Guidelines for DFS Replication
https://techcommunity.microsoft.com/t5/storage-at-microsoft/staging-folder-guidelines-for-dfs-replication/ba-p/423200
Hope the information above is helpful.
Best Regards,
Daisy Zhou
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