TucsonShopper
High speed class 10 memory works great in my new Microsoft Surface RT (saved my over $80 for an addition 32GB from MS). All of my work for the past decade fits into 32GBs. At $19, it costs less than any other class 10 card (in other words, it's the fastest at this price). It's plenty fast for me. But, as reviewer NLee points out, it is very easy to confuse this with much slower class 6 cards (so be careful as you compare). This card worked as soon as I plugged it in - with no problems. Highly recommended. Now, some test the Transend microSD as faster (see first commend for one URL), but performance is more likely limited by your reader. SanDisk is the most popular for good reasons (#1 selling microSDHC card at Amazon). Now, this also means it is the most popular to counterfeit (the likely source of most poor experiences - recent sources estimate that millions have been purchased just on eBay and others have confirmed getting fakes through Amazon vendors). This comes with a SDHC adapter.Some (more expensive) cards you may want to consider (reliability and compatibility issues with others):Transcend Information TS32GUSDC10 32GB micro SDHC10 Flash Memory - No Box or Adapter(without adapter)Samsung 32GB High Speed MicroSDHC Memory Card with SD adapter(with adapter)Other items I also got for my MS Surface RT:Belkin USB 2.0 4-Port Ultra-Mini HubFosmon HDMI to Micro HDMI Cable (6 Feet)HDE Wireless USB Presentation Remote Clicker PenVG Hydei Edition Black Nylon Protective Carrying Bag with Removable Shoulder Strap for Microsoft Surface Windows RT 10.6-inch ClearType HD Display Tablet (32GB 64GB)Plugable USB 2.0 to 10/100 Fast Ethernet LAN Wired Network Adapter for Macbook Air, Chromebook, Windows, Wii, Wii U, Linux, and Specific Android Tablets (ASIX AX88772 chipset)GOgroove DynaMIX Noise-Isolating Earbuds w/ Microphone for Google Nexus 7 / Samsung Galaxy Note 10.1 / Asus Transformer / Coby Kyros / Kindle Fire / Microsoft Surface / iPad & More - Incl. Cleaning Kit