I thinkkkk mini usb or whatever it is the droids used

Edit: micro usb

Micro USB Cable,2Pack Extra Long Android Charger Cable 10Ft 6Ft,DEEGO Durable Fast Phone Charger Cord Android USB Charging Cable for Samsung Galaxy S7 S6 S7 Edge S5,Note 5 4,LG G4,HTC,PS4,Camera,MP3 https://www.amazon.com/dp/B01HRVABD0/ref=cm_sw_r_cp_api_i_IofxFbATY4G34

I don't know why people are downvoting u/silverfaustx beside the fact that it's not exactly what OP was asking. But I agree that their method works if you want to expand the amount of memory and therefore expand the amount of games.

With that said, the cable it uses is a basic phone cable that has been used for at least the past 10 years. https://www.amazon.com/dp/B01HRVABD0/ref=cm_sw_r_apan_glt_fabc_Q1CTK8KKD7G1NDQZ27YS

Not sure if it'll show up for the UK but something like that plug. Or the UK version is different. Not sure. But that's what mine takes. Hope it helps.

My mini has a 32GB flash drive with more games than I'll ever play BTW. Worth a thought if that's what you're wanting next.