Dropbox may sometimes fail to show a preview of your files.
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Why Is Dropbox Not Showing File Previews?
Long story short, this is a problem with multiple possible root causes.
If you use a Chromium-based web client, navigate toSettings, selectSite data, and then selectAllow all cookies.
Switch to a different surfing app and verify if you might preview your files.
Dropbox supports the following four browsers:Chrome,Edge,Firefox, andSafari.
It works best on the two most recent versions of these browsers.
So, check for updates and drop in the latest web app release if youre running an outdated version.
Additionally,clear your internet tool cache, disable your extensions and test whether that helps.
Speaking of updates, find out if theres a newer OS version available and install it on your box.
For example, many macOS users confirmed that Big Sur 11.2 fixed this really bothersome issue.
So, patch your OS,clear your Dropbox cache folderand check the results.