Photos on USB flashdrive

[socalf49]

On a Nextbook v5, how do I save my uploaded photos to a USB flashdrive.
Also, I have a wrench at the very top of my screen where all the f's and down arrows are. How do I fix that?

Thanks Rukbat for the info. My Nextbook is not a phone, it's a tablet. I know I have USB capacity, I've sent Office Suite stuff to USb on this device but I can't figure out how to send photos to a USB.
And, regarding this wrenc, is there some way to get to this message that Google has sent me?

 

[Rukbat]

The wrench means that you have a Google message. (They've updated things, so all Android phones have been getting that for the past couple of weeks.)

For the flash drive, plug it in. If it's not recognized, it needs an OTG cable between the drive and the Nextbook USB port. (I'm not sure whether the Nextbook's ports inherently read flash drives, or you need the cable - which can be gotten for as little as about 99 cents (including shipping) on eBay from China - it's just an added tiny little wire, and Chinese wire is the same as ours.)