The Kingston 32GB MicroSDHC U1 can be found in stores in the package you see below. Both the nicroSDHC card and its adaptor are included in the package:
With the provided host adapter, the microSDHC card can be used like a SDHC card.
The benchmarks below were conducted with the microSDHC/adapter connected to a PC via a card reader, also provided by Kingston (Kingston reader USB 3.0). The sequential read and write speeds we got matched the card's specs quoted by Kingston, at 89 MB/s and 44.3 MB/s for read and write, respectively. However, reducing the block size for the random read test to 4 KB significantly impacts performance, which tops out at a mere 5.32 MB/s.
Randomly writing 512 KB or 4K blocks is not a strong suit for the microSDHC card, as the throughput dropping to zero-point-zero-something MB/s.
ATTO Disc Benchmark also gave a pretty stable 85.5 MB/s and 41.3 MB/s performance for write/read, but with files larger than 32MB:
Kingston's 32GB MicroSDHC U1 card is fast, at least in the sequential transfer tests. Achieving the maximum throughput from requires the use of a
UHS-I-enabled device or, better still, a USB 3.0-connected reader. So you can expect to transfer the entire capacity of the card to a PC in around 8-9 minutes when allied to a decent USB 3.0 card reader.
The provided adapter allows you to read the microSDHC card in a SDHC card reader.
The card retails online at Amazon .com for $23.