Smartphone users with a microSD slot can self-upgrade their storage in seconds at any time of the day and without buying a new phone. Plus, with the high cost of unlimited data plans, mobile phone users can utilize their microSD memory card to access offline data, rather than stream from the cloud.
microSD memory cards are continually improved and tested, and have been a major part of both consumer and industrial applications for many years.
Sandisk Ultra micro Secure Digital Extended Capacity (SDXC) is one of the top memory cards available in the market today.
Sandisk Ultra microSDXC runs on Ultra High Speed (UHS) Class U1 and Speed Class 10 for Full HD video recording and playback (Full HD (1920x1080) video. This memory card will work well for most people's needs. Testing the Sandisk SanDisk Ultra 128GB MicroSDXC UHS-I Card with Adapter on Window 10 laptop, the transfer read speeds was less than 100MB/s as claimed. However, Sandisk also noted that performance may be lower depending on host device, interface, usage conditions and other factors. The write speeds are a lot lower, so it’s not a card for recording 4K video.
Ultra microSD cards are available in 8, 16, 32, 64, 128GB, 200GB, 256GB and 400GB capacities. The card could be fully appreciated by anyone that uses their phone or camera to capture lots of HD video or images without wanting to clear the card as frequently.
Card Dimension is 0.59” x 0.043” x 0.03” (15mm x 11mm x 1.0mm) while with Adaptor: 1.26” x 0.94” x 0.08” (24mm x 32mm x 2.1mm). Regular size for all smartphones, tablets and PCs.
Design and Build
As with other of SanDisk's microSD cards, the Ultra microSDXC is waterproof, shockproof, X-ray proof, and tolerant of extreme temperatures. This provides the user with peace of mind that their stored media will be even safer than the devices that use the card. However, the branding is quite based. No difference from 16, 32, 64GB or the 400GB.
Sandisk Ultra microSDXC UHS-I Card never quite reached the 100MB/s read speed during our test but 93MB/s average is quite impressive. Sandisk does not disclose expected write speeds other than to say they'll be slower than the read performance.
Excellent for full HD video
Slower transfer speeds than most microSD memory cards
The SanDisk Ultra microSDXC 128GB memory card is ideal for Android-based smartphones and tablets. It is a great option for customers whose primary interest is to maximize the storage capabilities of their Android or Windows phone or camera without having to compromise by shuttling multiple cards or storage platforms. Good for average use.