We got the following 32GB MicroSDHC Class 10/UHS-1 memory card on sale for $18.99 and it works great in the 820:
http://www.amazon.com/SanDisk-MicroSDHC-Memory-Adapter-SDSDQU-032G-AFFP-A/dp/B009QZH7BU
Similar Class 4 card at the AT&T store costs $59:
http://www.att.com/shop/wireless/accessories/data-memory/sku6090235.html
Or $22 on Amazon:
http://www.amazon.com/SanDisk-Mobile-microSDHC-Memory-SDSDQ-032G-AFFP/dp/B007KFXIDE/ref=pd_cp_e_2
I'm not sure if the class-10/UHS-1 actually makes any difference; we didn't try HD video capture yet.
Install is simple: switch the phone off, pop open the back, remove the battery, install the card, put everything back together, and turn on the phone. After a second or two, the phone asks if you want photos/videos/music downloads to automatically go to the card or on the main memory. Nice touch. Now my wife's 820 has more storage than the 920 and still cost less. We couldn't justify the additional cost of the 64GB cards. 32GB seems to be the sweet spot right now.
http://www.amazon.com/SanDisk-MicroSDHC-Memory-Adapter-SDSDQU-032G-AFFP-A/dp/B009QZH7BU
Similar Class 4 card at the AT&T store costs $59:
http://www.att.com/shop/wireless/accessories/data-memory/sku6090235.html
Or $22 on Amazon:
http://www.amazon.com/SanDisk-Mobile-microSDHC-Memory-SDSDQ-032G-AFFP/dp/B007KFXIDE/ref=pd_cp_e_2
I'm not sure if the class-10/UHS-1 actually makes any difference; we didn't try HD video capture yet.
Install is simple: switch the phone off, pop open the back, remove the battery, install the card, put everything back together, and turn on the phone. After a second or two, the phone asks if you want photos/videos/music downloads to automatically go to the card or on the main memory. Nice touch. Now my wife's 820 has more storage than the 920 and still cost less. We couldn't justify the additional cost of the 64GB cards. 32GB seems to be the sweet spot right now.
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