dropbox desktop app force sync on folder

I went to a concert last Saturday and took some photos. Something more serious happened to me few days ago and it is the same problem: I am guessing it didn’t even sync back to Dropbox because Dropbox detected that the photo I pasted from my backup drive has the correct checksum which is stored locally in Dropbox’s database. How I got rid of the “red x” was to copy the corrupted photos from my backup drive and paste it back to my Dropbox and it immediately change to a green tick. These 2 photos are corrupted and will never be uploaded. Under my Dropbox folder, the status will be saying “Uploading 2 files”.

There will be a “red x” beside some of the photos, and when I open it, only the top part of the image will appear while the bottom remains grey throughout. Recently I upgraded my Dropbox plan to 50GB for US$99/year and hence I am able to place all my photos in Dropbox for syncing them across all my computers. If you look at the above screenshot, that is what happen to a few of my photos in different folder within the Dropbox’s Photos folder.

Dropbox desktop app force sync on folder