Hi Mike,
Instructions on how to use the dropbox are in your Externship Booklet for Veterinary Assistant.
You should log into your portal, and then go down to your externship course and click on the Digital Dropbox button.
Once in there you will see a place to click to upload files. Uploading files to the Digital Dropbox is like uploading files into any online system...there will be a browse box for you to find your file on your computer. Once you find the file, you will need to use the dropbox down menu to select the folder that you wish to place the files into - again instructions as to which folder you should use are in your Externship Booklet.
If you have more questions about the Externship Process, I would recommend you use the "contact instructor" option in the help center of your student portal. This way we can talk to you in a private setting about your specific externship concerns. Due to privacy, we can only provide general information in this public space. This should be enough to get you going!