Top Alternatives to ExpanDrive

FileZilla is an open source FTP (File Sharing Protocol) client for connecting to remote FTP servers.

Transmit is an FTP client for OS X. Developed by Panic, Transmit is shareware.

GoodSync is a backup and file synchronization program. It is used for synchronizing files between two directories.

RaiDrive is a cloud file manager that supports Google Drive, Box, etc

odrive is a Universal sync client to unify, sync, share, and encrypt all your files in Amazon Cloud Drive, Dropbox, Google Drive, OneDrive, Box, S3, WebDAV, FTP, etc.

Gladinet is an on-premises, enterprise file synchronization and sharing (EFSS) platform.

NetDrive is a drive mapping utility based on WebDrive technology.

CloudMounter is a reliable system utility that allows mounting different cloud storages and web servers to your Mac as local disks.

WebDrive is a drive mapping utility that uses open FTP, FTPS, SFTP, and WebDAV protocols, Mapping a Network Drive to a WebDAV Directory Using WebDrive to access remote file servers, and Amazon S3, WebDrive, Google Drive, Dropbox.

rclone is rsync for cloud storage.

win-sshfs is a small application designed as an SSH (SFTP) filesystem.

CloudBerry Explorer provides a user interface to Amazon S3 accounts allowing to access, move and manage files across your local storage and S3 buckets.

SFTP Net Drive helps you map remote drives as local drives.

Degoo is a cloud storage platform.