![[Older Version] SanDisk 512GB Ultra MicroSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUAR-512G-GN6MA](https://m.media-amazon.com/images/I/414HisOUYiL._AC_.jpg)
![[Older Version] SanDisk 64GB Ultra microSDHC UHS-I Memory Card with Adapter - 120MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUA4-064G-GN6MA](https://m.media-amazon.com/images/I/31EgEtAZ0FL._AC_.jpg)
works very well in my samsung note 3 and for 4k video recording. good packaging and presentation. card and adapter is sealed in a disposable plastic tray. the print on the front side is a dark orange-red and is more visible under bright light. the backside of the card is dark green around the edges and metal contacts. there is a black rectangle bulge slightly raised on the center. this is normal and its part of the card. card does fit into micro sd card slots without any problems. sequential read and write speeds exceed the numbers claimed by sandisk's 90 MB/s read and 60 MB/s write.
i tested this card using my
Kingston Digital MobileLite G4 USB 3.0 Multi-Function Card Reader (FCR-MLG4)
plugged in a usb 3.0 port on a gigabyte GA-Z97x-UD5H-BK mobo with an intel i5 4690k windows 10 pro build 10586 on ssd.
using crystal disk mark 5.1.2 x64 all tests scored above 90 MB/s read and 60MB/s write from 50MiB to 32GiB. 4k reads peaked at 11MB/s and 4k writes peaked at 4MB/s.
in ATTO disk benchmark v3.05 transfer size set at 512B to 64MB the sd card does 96.5MB/s reads and 63.7MB/s writes. i did get a drop in read and write speeds near the end on 32mb, 48mb, and 64mb while testing on queue depth at 10 possibly caused by atto disk bench lag issues. i feel this performance drop is insignificant and should not be taken into consideration.
in my note 3 on A1 sd bench,(i forgot to do screenshots only wrote it down)
quick benchmark results:
72.15mb/s read 24.23mb/s write, 67.7mb/s read 22.9mb/s write and 90.4mb/s read 23.0mb/s write,
long benchmark results: 21.26mb/s read 21.37 mb/s write and 20.74mb/s read 21.31mb/s write,
random I/O: 12.44mb/s read 1.25mb/s write. i think A1 sd bench gives lower results numbers than other synthetic benchmarks.
now real usage scenarios: transferring 13.6gb of small files from my ssd to this card took 253 seconds or 4.22 minutes. this is a great card at a sub $75 price.
| Special Feature | Class 10 |
|---|---|
| Read Speed | 90 Megabytes Per Second |
| Item Weight | 0.01 Kilograms |
| Write Speed | 60.0 |
| Hardware Interface | microSDHC |
| Secure Digital Association Speed Class | Class 10 |
| RAM | 32 GB |
| Hard Drive | Memory Card |
