SanDisk Ultra 64GB SDXC Memory Card, Up to 120 MB/s, Class 10, UHS-I, V10

Product Information

SanDisk Ultra is a brand of Western Digital which is the same company that sells external hard-disk storage devices under the brand WD Elements and WD Portable.

Blazing transfer speeds lets you offload cards fast. Use with the SanDisk® MobileMate® USB 3.0 microSD™ card reader 6 to achieve up to 150MB/s speeds 2. COVERAGE: The plan covers all defects & malfunctions under the original manufacturer’s warranty. The plan starts the day after the manufacturer’s warranty ends. It does not cover physical or liquid damage, accessories, consumables or parts that are not covered under the standard manufacturer’s warranty. Benchmark Crystal Disk mark scores for a file transfer of 500 MB size were 34 MB/s -Read & 19 MB/s – write which looked like a mere consolation. Transfer between my Samsung S7 mobile & S2 tablet too was not fast.

In Linux OS laptop the available storage space on this FAT32 pen drive is shown to be 61.5GB. So that's 4GB more than what Windows OS calculates using their NTFS File System. With your Linux system's file format, you will have better storage space than any Windows File System. CONSTRUCTION: The device has a plastic body & the overall construction of the drive is just average. The retractable plastic column seems to the weakest link of all and would surely break if you accidentally step over it. However the actual drive storage portion is built of a rigid plastic and won’t give up so easily. Both the USB ports are built of metal which again is quite a relief. But For Example, If you have decided that you won't use it on mobile phones or tablets because the fitting is too tight and you don't want to risk damage to this point which is primarily used for charging - then go ahead and format the pen drive for your laptop.

STORAGE SPACE: Just as in external hard-disk drives, the actual usable storage space will be less than what is mentioned on the product. STORAGE FORMAT: Since the previous FAT32 version had a limitation of file transfer size of a maximum of 4 GB for a single file & NTFS was not compatible with mac OS so with increasing file sizes ex FAT format was devised which doesn’t have a size limitation like FAT yet is compatible with Mac as well. So our drive has only ex FAT & NTFS formats to choose & comes in ex FAT by default with 128 KB file allocation size. Increasing the file allocation size may increase the transfer speeds a little but will affect the storage capacity little too. Changing it from 128 to 256 KB increased my write speeds from 13 MB/s to 15 MB/s if that’s a relief to anyone. HEATING: Even with just 10 minutes of use, you can touch and feel that the metal part of the pen drive is getting heated. But the performance of the drive has not got affected by the heat. This heating does not happen in WD external hard-disks and seems to be unique to small pen drives of various brands. FREE APP: Memory Zone App for Android is bundled free in this pen drive. It is easy to install and doesn't take any Phone Permissions other than Storage Access. It is very useful App with easy user-interface. App takes 64MB storage space on Android Phones.MOBILE PHONES: The pen drive works with Android OS of Mi phones such as Redmi Note running Android including old Android Version 9 as well. Full HD (1920x1080) video support may vary based upon host device, file attributes, and other factors. See: www.westerndigital.com/brand/sandisk/hd-video-definitions. SAME AS OTHERS: For the 64GB pen drive, actual storage space available is 57.2GB. This is normal and not some fraud or fake advertisement. This is because it has FAT32 File System. Also, the device uses some space for its functionality and use. SanDisk is an Israeli-American manufacturer of flash memory products, including memory cards and readers, USB flash drives, and solid state drives. As of February 2015, it is the third-largest manufacturer of flash memory.