Create Recovery Drive in Windows 10  

Thanks Brink, I used a Sandisk Ultra 32gb stick and it worked great.

Only used 6gb though so size was not the problem. It was only a couple of dollars more though and once my system gets bloated with updates in the future I may need that size!

I have followed the create recovery disk procedures. I NTFS formatted four new 16gb usb disks, as I am going to create recovery disks for two desktops and two laptops. All four are 64 bit systems. I check the box to back of system files and then click 'next'. It searches for my usb drive, but does not find it. It then prompts me to insert a usb drive again. I insert a different drive and it still doesn't find it. I've tried this with four different usb drives. All are formatted NTFS. What am I missing? Help.

Brink, thanks for responding. My circumstance is different than the page you referenced. I am not attempting to boot from a usb drive at this point. I am only attempting to create a usb recovery drive using the Windows 10 recovery drive utility in Control Panel. I've attempted to create a usb recovery drive using four different, brand new usb disks. The recovery drive doesn't recognize these disks and keeps prompting me to load a usb drive. However, these same usb drives are recognized by Windows Explorer, so I know they are not defective. Back in Windows 7, one had to create a bootable usb disk before copying the Win 7 ISO. According to my reading, when you check the 'copy system files' box in the Windows 10 recovery disk creation utility, the usb disk does not have to be bootable. But, I am wondering if that is the problem. Does the usb disk have to be bootable before I can create a recovery disk? If so, how does one create a bootable usb disk in Windows 10?

The good news is I ran the Win 10 create a recovery disk utility in my other three systems and it worked as it was supposed to in all three. So, I have one desktop that doesn't recognize the usb drive when I attempt to make recovery disk. During normal operations, it does recognize the usb drive. Now that is a conundrum. Any suggestions on how to troubleshoot that problem?

Bit of a bummer - I just bought a 32GB Toshiba USB stick to make a recovery drive, 'cos Windows 10 says I'll have to have 32GB space on the recovery drive - and, guess what - a 32GB drive is actually 28GB! It looks like this drive may be useless for this, but I'm giving it a go anyway.
If it's no good, I've got to shell out over £24 for a 64GB drive, which is overspend and overkill, but there's nothing in between, like, say, 48GB.
In the meantime, I can use this 32GB drive to make a "simple" recovery drive without backing up system files, which will give me an escape pod in the event of a crash, but isn't ideal.

ATTENTION! If you have to make a recovery drive in a hurry, and (like me) all you have spare is a 1TB external drive, this will do - BUT - if later you get another USB drive to re-make the recovery disk, you will find when you look back at the 1TB drive, it's now showing only 32GB capacity! This is because only the primary volume is recognised in Explorer, and that's what the drive has been formatted for. All is not lost, however - press Windows-R and enter diskmgmt.msc This will check all your attached drives, and you'll find the 1TB drive has a 32GB primary volume and the rest is unallocated. Use the utility to delete that primary volume (right-click and follow instructions) then make the whole drive as a "simple volume" - then you've got your drive back!