Can I use portable storage to keep my work files with me while working from home? 

It may seem very convenient to transport your files on a portable storage device (like a USB drive) to wherever you are working, but doing so exposes those files to greater risk of compromise or loss. Standard 660S1: User Rules of Behavior explains risks and requirements of portable storage devices. Instead of taking your files with you, use an approved cloud storage solution, such as Microsoft OneDrive or SharePoint. These applications are available on most Office 365 subscriptions. Prior to using any other cloud storage service, refer to Policy 560: Cloud Storage Services and its related security standards.  Please note that your agency may not permit the use of cloud storage solutions such as OneDrive and SharePoint due to regulatory requirements.  Check with your IT administrator if you do not know whether this is permitted.