File sync error

Hi Dave, I use Adobe between two computers, however, I only access or edit files from the one I'm on.

I've witnessed files selectively / unreliably sync for months, however, today I opened the Creative Cloud app and it says all my files are up to date. However, when I open the Creative Cloud folder on my desktop, a couple of the folders have a little icon next to them-- a red triangle with a white exclamation point in the middle. When I click on these folders, none of the contents have those icons.

Within the past 2 months, I've largely had to stop saving files to my desktop Creative Cloud folder because it says I don't have permission to save there. No amount of signing in and signing out or shutting down my computer or checking for updates has changed this.

Additionally, when I am able to save some files to the folder, and I try to open them back up in the same adobe program I saved them from (say, a .PSD file in Photoshop), it says the file is corrupted.

This is all from one computer. Can you please give me some troubleshooting advice for how to make sure my files sync?

For the last couple months, I've been having to choose whether to save a file on my desktop CC folder or to upload it to Adobe.com; because when I upload to Adobe, I never know when / if it'll sync on my desktop.