> For the normal files, can each each computer sync with a specific folder on OneDrive?
> Can the private files be excluded from syncing with OneDrive?
As TKujala suggested, to achieve these 2 needs, you need to choose which OneDrive folders to sync on 4 computers. So, you can put private files into specific folders, and do not snyc them.
But please note, If you uncheck a folder you are syncing to your computer, the folder will be removed from your computer. The folder and its contents will still be available online.
In the above case, If you need to untick the folders of private files, please remember to move these files out of your local OneDrive folder first., this action can avoid that the private files need to be downloaded from the cloud to the local after canceling the synchronization.
> And, finally, can a special shared folder be designated so that all computers can access specific files?
I would suggest one people share a folder to other people. Then let those other people add and sync shared folders.
For more information, please refer to "Share OneDrive files and folders", "Add and sync shared folders to OneDrive for home".
Hope the information could be helpful.
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