A Microsoft file hosting and synchronization service.
Note : I am not a Microsoft employee and the responses are based on experiences and best effort.
Hi Grimble,
Thanks fo the updates.
This is going to need some understanding.
You have a personal Microsoft Account.
Personal Microsoft Accounts do not get Sharepoint.
Sharepoint is only available on Corporate tenants.
Personal Microsoft Accounts can be added as guests to a Corporate tenant.
What you are describing as OneDrive on the SPO Folder is likely a Folder sitting in someones Sharepoint, where you (your personal account) are added as a guest.
It is quite likely that you are able to access this over a browser with no issues at all. However when you are syncing, the sync can break from time to time.
The reasons for this are Conditional Access and Data Governance. (to keep things simple)
The is probably rules in place on the corporate tenant requiring guest accounts to verify themselves at particular intervals or in particular conditions. These are the times when the sync breaks and you are facing the issues.
As Thomas4-N has mentioned above, If you fidn that the problem is no there when you don't link, then you can choose to not link it if you are fine with uploading and downloading over a browser.
However if you need the convenience of using FIle Explorere instead of a browser, then Sync it when you need and when you know you are not going to use it for a while, then stop the sync (for the folders).
The way to identify the sync you want to stop is pretty simple.
Your Personal OneDrive will show as a White Cloud icon in your system tray.
Your sync to the Business FOlder will show as a Blue Cloud icon. To stop the sync temporarily, simply right-click on the blue cloud icon and select Stop/Pause Sync.
If this works for you, please Mark is as an Accepted/Resolved, so that it can aid others as well
If some part has worked, please add additional notes, so that I(Community) can provide additional support based on additional information.