Does Dropbox reduce the quality of pictures?

[Guy R P.]

I am told that, due to compressing techniques used, (professional) pictures stored loose quality when stored and then downloaded from dropbox.
Is that tru?

[Dave M.43]

I'm pretty sure it isn't. If they do compression it is probably lossless, meaning the removal of extraneous/duplicate data which doesn't affect the quality of the image at all. See:
[removed per the Community's Guidelines]
Dave

[Peter M.63]

I put some photo's into Dropbox to share with a friend. I asked him if he was able to download a photo at original quality as it's important for us at a future stage to be able to send each other original sized images.

 I uploaded one photo that was 7.33mb - he downloaded same, but it downloaded at 256kb!!

 I did a 'Save As' on the same image and it came out at 2.85mb.

 What on Earth is going on?

 If we cannot exchange full sized images between each other without loss of quality then Dropbox will be dropped!!

[Rich · Accepted solution]

Make sure you're using the Download button to get the original file. If you're using the browser's Save functionality, all you're saving is the preview of the the original file, and not the original.

[This thread is now closed by moderators due to inactivity. If you're experiencing a similar behavior, feel free to start a new discussion in the Dropbox Community here.]