Waiting to upload 1 item (iCloud Drive stuck)

So my iCloud drive had been stuck for a few days and I just noticed it because some files were out-of-sync.

I troublue-shot and google and this is why it seems it fixed:

1. Start by opening any Finder window and locating “iCloud Drive” on the left sidebar. 

2. For the best organization, switch to list view by going to “View,” pulling up the drop-down box and selecting “as List.”

3. This is tricky, as the Mac does not default to showing file sizes for folders. Fortunately, this is quickly rectified by going to “View” again and clicking on “Show View Options.” 

4. When that window appears, look toward the bottom of the new window and make sure “Calculate all sizes” is selected. As soon as you select it, the file sizes will appear for all iCloud Drive folders.