Amazon's Gold Box deals always tend to gravitate back to flash memory storage every few weeks. Today is another iteration with discounts on many Sony SD cards, USB drives, and more interestingly for mobile users, microSD cards and microUSB OTG flash drives.amazon-gold-box-sonyIf your phone has a microSD slot and you want to add extra storage for your media files, you may want to pick up the 64GB microSD Class 10 card for instead of $115. The smaller variants are also discounted, with the 32GB going for instead of $55, and the 16GB on sale from to .Lucky for you, if your phone doesn't have a microSD slot or you already have a card but still need more storage for your very legal movies and albums, there's an alternative option in today's deals. Sony's microUSB OTG flash drives are all discounted around 20 to 30%. The 16GB is on sale for and the 8GB for , but with the size of media files these days, you should just skip them and go for the 32GB at instead of $30. All drives are tiny and have a regular USB connector for your computer as well as a microUSB one to plug right into your phone. (Note: many Android devices, including all recent Nexus and Google Play Edition phones and tablets, don't have USB OTG capability.)As with all Amazon Gold Box offers, these are Prime compatible and are only valid today while supply lasts.Source: Amazon Gold Box