Windows 10: How to sync a custom folder on a large disk to OneDrive?

My C: drive is running low on space. My D: drive has plenty of space. I would like to move some files from C: to D: but I still want the files backed up to OneDrive. How can I add a folder that is not currently part of "Desktop", "Documents", or "Photos" to what gets synced with OneDrive?I tried adding a folder on the D: drive to the "Documents" Library. Now under "Libraries" and "Documents" I do see the new folder. But it doesn't seem that OneDrive is using this to determine what to sync.Thanks

:)

 

OneDrive won't synchronize a folder with a large number of files

OneDrive won't synchronize or upload a folder that contains a large number of files. This problem is persistent, and other people have reported it. What happens is that OneDrive spends a couple of days working (with lots of disk activity but no usage
of the Internet at all), and then reports that all files and folders are up to date. They are not: the folders are present on OneDrive but the folders are all empty.

Others have reported the same problem. Someone has offered answers that go off onto irrelevancies. Just to be clear:

• The issue is not the size of files, the issue is the number of files.
• The issue is not internet connection speed; the issue is the number of files.
• The issue is not speed of upload; OneDrive doesn't upload the files at all.

 

Microsoft turns on shared folder sync for OneDrive

Source: Allow folders to be shared/co-owned with access/sync the same for all co-owners - Feature Suggestions for Microsoft OneDrive

 

OneDrive Sync Issue

Honestly, I don't understand why you haven't already tried to boot with WinPE or other live disk and manually remove the file? This example using Macrium WinPE boot disk, download Macrium Free and let it create a boot disk for you. Option to create one is shown automatically when you launch Macrium first time:

1. Switch to C: drive
   
2. Change the working folder to your OneDrive folder
   
3. Check that the file has no Read Only (r) and System (s) attributes set. As the file name in your case is quite long, you don't have to type the full name. Use the *.* wildcard to replace any number of characters in file name and any extension, in your case command attrib .849C*.* should be enough
   
4. If r and / or s attributes are shown for the file, remove them with command attrib .849C*.* -r -s
   
5. Check that attributes r & s are removed
   
6. Delete the file with del .849C*.*

(Steps 3 & 5 not necessary; step 3 because removing attributes as in step 4 removes them if set but does no harm if not set, and step 5 because the attrib command works for 100% sure if no error messages are given.)

The file should be removed now. You can test with command dir .849C*.*, it should not be shown anymore.