Kingston Digital 64 GB SDHC/SDXC Class 10 UHS-1 Flash Memory Card 30MB/s (SDX10V/64GB)..
Buy Kingston Digital 64 GB SDHC/SDXC Class 10 UHS-1 Flash Memory Card 30MB/s (SDX10V/64GB) By Kingston
Most helpful customer reviews
60 of 62 people found the following review helpful.
By Accountability
Although the file system may prove confusing to many at first, this card is one of the closest things you can get to a mini-SSD (tiny non-moving hard drive) for at or under ~$100 (less on sale).
I decided to write a review here because many other reviews didn't mention a few critical pieces of information.
First and foremost, this card does support alternate file systems. Out of the box, if you don't have at least Windows XP SP1 (with update KB955704) on your PC, OSX 10.6.4 on your mac, and the "SDXC" logo on your camera or device, this card may not be recognized properly in its native exFAT filesystem, and your various computers and devices may not be able to format it in a way that is compatible with your other devices. If you format the card with NTFS, it will work on older Windows systems (and UNIX-based machines with ntfs-3G or FUSE-ntfs). If you format it with FAT32, however, it will work on almost every device I tested, even those which claim to support the SDHC (32GB max) standard. This is because there are basically no physical differences between older SDHC cards and these newer SDXC cards except for their capacity. Additionally, this means if you format the card with FAT32 on a compatible computer, you can use it in almost every camera, computer, or device that supports 4GB cards. That's right, when formatted to FAT32, I've tested it in a couple of devices that advertised a maximum capacity support of only 4GB, and it still played well with all the other old devices too!
Compatibility aside, the speed of the card deserves note. All cards are internally printed on different wafers of NAND (that's the actual flash memory inside these chips), so results may differ slightly especially in terms of small cluster random writes, but with my system and reader I have benchmarked sustained write performance of 16.4MB/sec and sustained read performance of 42.6MB/sec. If the "class" system were to be expanded, this card would therefore be closer to a "Class 16 card" in write performance and/or over a "Class 42 card" in read performance. I tested this on the built-in card reader in my 2011 Dell laptop, so if anything, these figures are conservative and you may experience higher transfer speeds on a dedicated USB 3 SDXC reader.
I've used many Kingston products over the years, and most if not all have been virtually problem-free. This card lives up to the trend. (Yes, I've used a lot of SD cards!) For better or for worse, this means I cannot comment on the warranty, since I've never once had to use it.
The only reason for deducting one star is lack of UHS-1 controller support at this capacity and price, so it does not explicitly take advantage of the faster 104MB/sec bus speed or 1.8V low-power operation mode. It is not consistently the cheapest card in this capacity, nor is it the fastest or "lowest power" to use (yes, this may become important when your whole device operates in the mW range). For most, the distinction is next to nil, but I found it worth mentioning regardless. In sum, although it strikes an excellent balance, it is still a tiny bit lacking in other technical regards.
26 of 28 people found the following review helpful.
By Amazon Customer
I bought this card in March of 2013. By May, the card would not function in my tablet. After reformatting it, it still resulted in continuous I/O errors. Unfortunately Amazon would not return this item because it was out of their 30 day window. Buyer Beware!
A followup: I was initially frustrated, but Kingston's lifetime warranty was honored very professionally by the Kingston company. I mailed them back my card and they sent a new one that has worked perfectly thus far. Therefore I am raising my rating to 3 stars. If it works for an extended length of time, I will raise it again because of the excellent customer service.
11 of 11 people found the following review helpful.
By AdamDZ
Rather slow for a Class 10 card. It writes 11MB/s and reads 22MB/s. My other card is 64GB SanDisk, also Class 10, and it writes 20MB/s and reads 45MB/s. I bought this to have some extra storage in my MacBook Air and it's a perplexing choice: less storage, but quicker, or more storage but slower. BTW, test results were the same on the Air and my Dell Latitude regardless of the filesystem.
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