

But back to file systems, NTFS can handle files larger than 4GB and is a solid file system from a reliability/resiliency standpoint, but you will not be able to boot UEFI systems from it, at least not without going through some extra hoops - and if your system came with Windows 8.1, it's very likely to be a UEFI system.

That said, I also try to avoid storing critical data on USB flash drives since they tend to fail more often than spinning drives and SSDs, and that's especially true when they're written to heavily, which will be true in your intended use case - so you may want to give that some thought. FAT32 also isn't a great file system from a reliability/resiliency standpoint in general, so I personally try to avoid storing critical data on it. Reflect can split backup files automatically to work around that, but that would prevent you from using Incremental consolidation, which you may want. FAT32 is preferred for Rescue Media because it allows you to boot both Legacy BIOS and newer UEFI systems, but it doesn't support files larger than 4GB, which obviously isn't ideal for storing backups.

But if you're limited to a single partition, that then raises the question of what single file system to choose, and there's no perfect answer for your intended use case. There's one trickier setup I'll describe later that you could use, but it's not really for the non-techy. If you create a multi-partition flash drive elsewhere and connect it to a Windows system running an older version, you will only be able to access the first partition - so if you're primarily using a Windows 8.1 system, a multi-partition solution where you'll need to access the contents of both partitions isn't workable. Versions of Windows prior to Winddo not support multiple partitions on a USB flash drive. Settle in, because you opened a bit of a can of worms here. The Ultra Flair won't come close to the 128GB flash drive you linked above (I also have that model in 256GB form, so I speak from experience), but high performance isn't exactly a priority for just booting Rescue Media. I have a few SanDisk Ultra Flair units because they're physically small, very inexpensive per GB, and are still faster than your typical USB 3.0 flash drives especially on writes, where most USB 3.0 drives behave no better than USB 2.0 drives. In your circumstances, may want to consider buying a separate device to use as Rescue Media.
