Creative Cloud folder location on C drive required?

Since I began my CC subscription several years ago my CC folder was located on an external hard drive.  Syncing worked fine, until recently.  

After working with Adobe to help fix the constant sync problems I was experiencing I was told by an Adobe tech support person that CC was designed to have the folder located on the C drive. 

I have a 2 TB plan with Adobe but have just 500 GB on my SSD 'C' drive.  I decided to move some files to C that I wanted to sync while leaving other files on the external drive that don't sync and purchased a seperate cloud back up system.

Since I moved my sync files to the C drive I have not had any problems with syncing to the cloud.  But my preference is to free up my C for other things and have ALL of my pictures and media on an external drive (SSD) and sync with the cloud.

Has anyone else been told that Cloud is designed to work with C drive?  It doesn't make sense to me, I know a lot of people store all of their files on an external drive.

Thank you,