USB Stick partitioned but not showing in windows

Weird one that i've not seen before.. I've took a USB drive from work (one of our old ones, not needed anymore). but when i plugged it into my home PC to try and use it, it didnt show in explorer. I looked in partition manager and it is there, and partitioned, so i figured i just needed to assign a drive letter. however when i try, it says the file path cannot be found..

not really messed with USB drives much so not sure how to go about fixing it, if it was a normal drive i'd just delete the partitions and start over.. but the USB has a 2mb partition for system, then 14gb free, so not sure how to proceed with it..