What are some alternatives?
When comparing ExpanDrive and RaiDrive, you can also consider the following products
WebDrive - WebDrive File Access Client allows you to open and edit server-based files without the additional step of downloading the file.
NetDrive - Cloud storage as hard disk
Rclone - rsync for cloud storage.
odrive - Odrive aggregates all cloud storage accounts in one system and keeps it synchronized, sharable and encrypted.
Cyberduck - A libre FTP, SFTP, WebDAV, S3, Backblaze B2, Azure & OpenStack Swift browser.
Mountain Duck - Cyberduck for mounting volumes in the file explorer. Available for Mac and Windows.