Image thumbnail not showing up, only generic icon when i goto 'camera uploads' to try to attach imag

Thanks ramblinsu.

Yeah. Try doing that several times a day and see if you still think of it as a 'solution' I along with others have sent over screenshots and other information on this and so far Zilch after the intial exchanges.

As a photographer when editng I am constantly draging or importing things like textures into my work and dropbox is a way of ensuring access to those from different devices and locations. Once the thumbnail vanishes I have no idea what that texture looks like, As I may import a number of textures into an image to work out what is best for that creation I quickly end up with a folder that is effectively useless to me.

Will have to start looking at Amazon or Adobe cloud options instead as this is now ludicrous. A week and our studio opens back up from lockdown. Once that happens I cannot be messing around like this.

I feel your pain as a working photographer. However, so far this has worked for me. I also have a Box account and Amazon Photos. I may give Box a test run. For me it depends on the integrations with other apps. DropBox provides a lot of integrations that I wouldn't want to work without. 

I've had this same issue all week and tried every suggestion I could find.  What worked for me was using the Disk Cleanup utility in Windows 10 (Right click on your hard drive and select Properties in the menu).  I deleted the thumbnail cache, rebooted my pc and after Dropbox started again the thumbnails started re-appearing.

Same issue here on a clean install of Win 10.  I  did not have this issue before the clean install.  I'm not using smart sync, all files are local.  It only happens with folders within dropbox.  If I move the folder to downloads or some other location outside of dropbox the thumbnails show.

I have deleted thumbs via disk cleanup and command prompt.  I checked and unchecked the "show icon" button.  Nothing worked.

On small folder switching to online then back works but I do not want to do that for my main pictures folder as it's 125+ gb.  This is obviously a bug!

I have the same problem. Double clicking the file to open it does not resolve the issue, the files are synced locally. For me its happening in the folder Dropbx > Screenshots. Its not happening to every file in that folder, only some of them, but a large percentage

I am using the file explorer on my Win10 desktop and am only seeing the icons. I don't want to sync every single file locally with smart sync. I want to be able to see the thumbnail so that I can select the correct file to sync locally. How can I do this? What is the way to fix this? I wish you had posted the answer publicly instead of having to email people individually. Please assist.

There is apparently no permanent solution to this problem and Dropbox seems unwilling to address the issue.

I am pretty well an ignoramus with computers but I may have stumbled and fumbled my way to a solution to this problem.

I found that several of my folders had random images showing only the place marker with a grey X and no thumbnail. I back up all my photos onto an external hard drive so when I found a file which was badly corrupted this way I simply deleted it then replaced it from the external hard drive and right clicked to set all the files to "local".

Another hack for individual images was to right click them, make them "Online Only" then right click again and make them "Local".

That will be because it has nothing to do with failing to check the right boxes. As you would have discovered if you read the thread first. This was a bug with Dropbox that has been accepted as such by them and hopefully now corrected. It has nothing to do with generic settings. It was the loss of thumbnails after dragging and dropping  image files, in my case background textures, into the likes of Photoshop or making use of drag and drop uploaders