Cannot upload files any more??

Now when I try to drag and drop files from my computer onto my phone I get an error message saying it's too large because the phone is on "Remote Connection Mode" but it isn't! This is a new error. It used to always send files. My phone is on the same connection as my mac as usual. Help. I love this app.

I just downloaded this program tonight and tried to transfer a few music files and it gave me that same message. I hope someone can help fix this issue.