Detect in device manager and disk management, but not in explore

Hello,

pardon me for my bad english

Recently ive write chrome os iso file on my usb. then bla bla ive tried, it didnt work. so i decided to turn the bootable usb back into normal.

i can only format it into 1 gig. i look upon the disk management and so the usb devided into so many partitions. out of stupidity [anger haha] ive deleted some partitions and it appeared unallocated. while some partitions, cant be modified.

after that.. i open the explorer and it seems to not detect the usb drive. but i can still see it in device manager. disk management. but not in explorer.

believe me, this is my last resort.
thanks in advance