Slow Export

In your System Info, looking at the Library path. It appears that you are auto syncing (backing up) to OneDrive. That can cause performance issues, especially on a bad Internet connectivity day. Some may argue, that it could lead to catalog corruption (should the connectivity somehow lead to a crash of LrC). Consider altering your OneDrive settings as to not automatically sync changes in the catalog.

Each export will cause an entry into the database, the catalog, you can see that entry in the history panel. And each entry into the database will trigger a change to OneDrive, thereby  causing a sync. busy busy busy.

In my opinion this is fault of Microsoft and their instance on Windows users logging in via a MS account instead of Local account and as such setting up OneDrive as you have it.

Backing up to OneDrive is fine, nice second destination, but I recommend doing so after closing LrC (as in copy to OneDrive). And many would recommend keeping at least one backup on a local hard drive (not containing your working catalog)

Some links:

• Lightroom and onedrive | LrC Community member posting
• Choose which OneDrive folders to sync to your computer | Microsoft
• OneDrive not synching catalog | LrC Community member posting
• How to stop lightroom catalogue syncing with your onedrive? | LrC Community member posting
• How to remove onedrive from my lightroom catalog location found in Catalog Settings | LrC Community Member Posting (that one mentions the connectivity vs performance vs sync issue)
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Fellow members, if my reply is incorrect, please correct me, and please provide reference material. Oh and if not incorrect, do you have reference material to support the above (would be nice to quote MS or Adobe for example)