Did you know your Galaxy S2 comes with OTG USB Host capability? You can literally store a ton more data by connecting your USB flash drives, USB hard disks (those that are powered independently), and even use your USB mouse to browse your Galaxy S2.
Well, you can buy one of theses cables on Amazon for like $3-5 but the delivery time is like 3-5 months. You can also pay $20 for it for faster delivery.
Better yet, why not learn to make your own?
On my first try, I used some electrical tape for wiring and only soldering was needed for shortening the pin 4 and 5 of the microUSB connector end.
Here’s a short video I took while I made mine:
I kinda put everything together in a hurry so next time I will make a more detailed video for you guys.
Sorry, this doesn’t work yet for T-Mobile Galaxy S2 (SGH-T989) and Sprint Galaxy S2 (SPH-D710) but should be supported with Samsung OTA update in the near future.