ODROID MicroSD UHS-1 XU4 Linux.

Also compatible with ODROID-HC1, ODROID-HC2, ODROID-MC1, ODROID-XU4, ODROID-XU4Q

Features:

Sequential Write speed : 10MB/sec
Sequential Read speed : 40MB/sec
Pre-installed Ubuntu15.04 or latest version.
Ready to run out of the box

SD/eMMC PERFORMANCE

You can boot from a MicroSD card or an eMMC module. The MicroSD interface supports the higher performance UHS-1 mode as well.
File access of a 512MB file (read/write) on three different storage options shows distinct performance differences.
The eMMC 5.0 storage is ~7x faster than the MicroSD Class-10 card in read tests. The MicroSD UHS-1 card is ~2x faster than the MicroSD Class-10 card in read tests. The MicroSD UHS-1 card provides a great low-cost option for many applications!

Write command
sudo dd if=/dev/zero of=$(mount-path)/test oflag=direct bs=8M count=64

Read command
sudo dd if=$(mount-path)/test of=/dev/null iflag=direct bs=8M

	SD-class10	SD-UHS1	eMMC 5.0
Write speed (MB/s)	8.5	10.8	39.3
Read speed (MB/s)	18.9	35.9	140

Note:

The supplier of the product has no replacement and/or refund policy as part of their product warranty/guarantee. Furthermore, the repair cost and the cost of shipping to and fro from South Korea has to be borne. As Fab.to.Lab is merely an intermediary we extend the exact same warranty terms to all customers of Harkernel.

Please find more details here: Supplier warranty terms and conditions: https://www.hardkernel.com/agreement/