In our iLounge Deal for today, we’re offering the TarDisk 64GB MacBook Drive Expansion for only $99.99 — that’s 32% off the regular price. This simple add-on lets you permanently increase your MacBook Air’s storage space by adding a secondary drive into your SD card slot. TarDisk supports UHS-1 SDXC transfer speeds and 4k flash memory controllers for data allocation, and the unibody aluminum enclosure means it fits invisible into…