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Mitz1's avatar
Mitz1
Explorer | Level 3
1 month ago

“Can't open the file because the file format/extension is not valid.” error on website/desktop app.

Hi, I’m having a serious issue with Dropbox where many of my files appear in the correct folders on both my computer and on Dropbox.com, but none of those specific files will open. I receive erro...
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Hannah's avatar
Hannah
Icon for Dropbox Community Moderator rankDropbox Community Moderator
1 month ago

Thanks for the update, Don, it is a pretty strange situation.

One more thing I'd like you to check is the syncing icon next to the files that are not opening; are the files set to "online-only"?

If so, can you right-click on them, choose "make available offline" and then try to open them to see if that makes a difference?

Mitz1's avatar
Mitz1
Explorer | Level 3
1 month ago

Hannah, in response to your post. I cannot tell for sure if they are set to “online-only”.  I hope you can see from this screen shot that an option to “make available offline” is not available.

Don

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