Images Not Uploading

I have v 1.3.9h and last week, uploading products worked just fine. Today, my client calls me and tells me that everything uploads when creating a new product, EXCEPT the image file!

I tried creating a new product myself and sure enough, everything goes live but I get a red error note at the top of the admin screen that says- Error: File upload not saved.

ANY idea what in the world could be causing this out of the blue??

Check that dir permissions were not changed

Permissions were 755 until a help file told me they should be 777. It still did not work. But I THINK I may have found the problem. I logged into clients cPanel and they have gone over the disk space limit. I'm upgrading their hosting account today, but practical thinking would tell me that because they exceeded their limit, there is an auto shut off with uploading files like images, etc. Which would explain to me why it allowed the text part to upload, but not any actual media.

I've never breached a limit so I don't know 100% for myself if this is this cause. If you can confirm this, maybe this post will help someone else in the future because I know I'm about to find out for myself in the next day or two :mellow:

755 would then be the secure dir default

And yes, bumping the limit will impact upload ability