Also important: it support devices larger than 32GB.
As flash devices get larger and cheaper eventually people will try say, a 64GB device. But a problem is that Windows 10 will only let you select NTFS or exFAT for devices larger than 32GB. Our boot loader, syslinux, does support NTFS but linux does not (well it kinda does), and exFAT is patent-encumbered and therefore frowned upon in the linux world (and has no native file system driver unlike FAT).
For a user to work around this, they would have to open Disk Manager and partition the device themselves, then install syslinux, then make_bootable. This adds to an already cumbersome procedure. Alternately they could download a 3rd party tool to format the device as FAT32 with larger cluster size, but again, adds more steps.
With >32GB devices, but <= 256GB, our Flash Creator tool will create a single partition 1 with FAT32 file system with larger cluster size, and then install bootable unRAID OS in that partition. For devices larger then 256GB, remaining space is simply left unallocated and the user could create a second partition for whatever use they want.
The point is, the Flash Creator tool makes the entire process easier. We deliberately put the code on github so that everyone can see that the executable is not doing anything nefarious.