Error copying bak file to _database dir

I have been copying files for my website over FTP without an issue. However, now I am trying to upload a 7MB .bak file so that I can restore my database and I am running into problems.

Each time I attempt to upload the .bak file it gets anywhere from 6-20% complete before it stops. Then after about 10 seconds I get the following error

I tried moving the file to my desktop and re-uploading as well as uploading the file to another directory in the website and renaming the file to backup.txt (that was a real long shot), but with no success.

Any advice or suggestions would be appreciated.
Thanks!

 

I am not sure what the issue was last night, but I was able to successfully upload the bak file this morning.

Thanks!