How can I add a local storage account (USB specifically in this case) remotely? In Remote management, I can view local disks (Including USB) under the disk space tab, but do not see an option under remote management or remote deploy to add as a storage account.
There are 2 different ways to add local filesystem account.
1. Centrally managed from the web console (on the Storage tab, where you found it already).
2. The second way is to configure it for that specific machine. Go to Remote management page, click on the gear button on the right. Then Edit -> Edit Local Filesystem Accounts.
Here you go.