StableBit DrivePool is described as 'State of the art, file based drive pooling software' and is a File Manager in the backup & sync category. There are nine alternatives to StableBit DrivePool for Linux, Windows, Mac, BSD and FreeBSD. The best StableBit DrivePool alternative is Unraid. It's not free, so if you're looking for a free alternative, you could try btrfs or OpenZFS. Other great apps like StableBit DrivePool are SnapRAID, Liquesce, mergerfs and Drive Bender.
Flexible operating system combining storage management with support for mixed drive sizes, Docker containers, virtual machines, hardware and GPU passthrough, browser-based interface, file protocols, scalable expansion, integrated parity, and monitoring features.
United States
Btrfs is a modern copy on write (CoW) filesystem for Linux aimed at implementing advanced features while also focusing on fault tolerance, repair and easy administration.
OpenZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community.
Drive Bender for Windows is state of the art, single point storage pool technology for all versions of Microsoft Windows (read more).
Australia
Greyhole is an application that uses Samba to create a storage pool of all your available hard drives (whatever their size, however they're connected), and allows you to create redundant copies of the files you store, in order to prevent data loss when part of your hardware...
Canada