Review on Kingston Digital 64GB microSD Class 10 UHS-1 Memory Card - High Speed 30MB/s with Adapter (SDCX10/64GB) by Michael Rosario

2013-08-26, rev. A. Update 4: Map crashed in Razr MAXX HD on 08/01/2013. Replaced under warranty, less hassle than SanDisk brand. This has happened to me twice and also to two different colleagues, all with Motorola Droid or Razr MAXX and MAXX HD phones. 04/22/2013, RevDOK after I formatted it to PHONE (which my computer wouldn't do) then it worked fine. I have 38GB of data to transfer via USB 3.0, the WinXP computer says the transfer will take 70 (55-100) minutes, you calculate for the data write speed. Motorola Droid X2 (Razr MAXX HD coming soon). Update 1: My problem with the old USB port disappearing (occurs on several computers) when moving large amounts of data seems to be back. I recommend transferring ONLY a few file folders at a time. I had to go scan MGR devices, PCMCIA (CardBus) adapters, for hardware changes. Then the USB 3.0 card and the USB 3.0 card reader worked again. Now I have to find out what I missed. Update 2: HD Tune reports transfer rates from 31.1 MB/s to 40.2 MB/s. Update 3: After formatting to FAT32 now 58.40 GB (64 GB card).