Any Reason Not to Use USB 3.0 Thumb Drive as a Record Volume?

I am going to narrate some audio books and want to add a dedicated drive as a record volume. (Previously, I've recorded short-form commercial VO and have recorded directly to the C: drive... with no problems at all.)

It's voice only, so my needs are simple. But...

1. Sessions can get rather long.

2. There are lots of punch-ins while recording. (Hey, you try reading a 10-hour book without mistakes!)

My recording PC is a Windows 8.1 desktop with USB 3.0 ports. Seems to me that formatting a fast USB 3.0 thumb drive (SanDisk 64GB Extreme USB 3.0 Flash Drive - reads/writes up to 245/190 MB per sec, respectively) as a NTFS volume would provide more than enough speed and capacity to meet my needs... and would do so cheaply ($43).

Today I ran a test using a very old USB 2.0 thumb drive. I formatted it as NTFS and recorded for 20 minutes. Not a single hiccup. Obviously, a USB 3.0 thumb drive would be wildly faster.

I could always put a second internal drive into the PC, but the convenience of being able to move the thumb drive to another PC where I typically edit is a big plus, and saves me a copying step.

Seems like a winner to me, but if someone knows a good reason NOT to do this and opt instead for either a separate internal drive or, perhaps, a usb 3.0 bus powered HDD (Seagate Backup Plus Slim 2TB - $90), I'm all ears.

I should mention that, of course, I will be making backups of the sessions recorded to the thumb drive... both to another local drive and to the cloud.

Anyone see a problem with this? Many thanks in advance.