It is hard to review a memory device because benchmarks against other cards don’t count when different hardware is used to test them. I tested the 128GB version.

Lexar claims that its new card will read/transfer data at 300MB/s and write at 260MB/s. I transferred a 300MB file over USB3.0 in less than a second. I copied a 19GB directory with 129,765 files in about 4 minutes – amazing

These high-speed cards leverage UHS-II technology (UHS Speed Class 3 (U3)) and also work with UHS-I devices at UHS-I speeds, and they’re backwards compatible with older cameras and readers, performing at Class 10 speeds when used with non-UHS devices. Although Lexar provides the caveat that use of SDXC cards in non-SDXC devices may not work if the host controller does not recognise it.

Its best used where large sized files are constantly transferred – like video and digital photography using a DSLR, HD camcorder, or 3D camera and transfer high-quality images and 1080p full-HD, 3D, and 4K video.

It comes Image Rescue software that recovers most photo and select video files, even if they’ve been erased or the card has been corrupted. The software is available for free download with purchase of the card.

The 128GB card will hold approximately 20,000 x 21MP photos, 1000 minutes of HD and 300 minutes of 4K video. It is also available in 32, 64, 128 and soon 256GB. The 32GB card costs under A$150 and the 64GB costs under $200.

It has limited lifetime warranty and is backed by expert, Australian technical support.

It is available from major retailers and IT specialists, and some camera stores although as they are new and more costly you may have to order one.