SanDisk Ultra microSDHC UHS-I Card, 16GB

So this is more difficult to review, because I'm using these exclusively for booting SBCs (specifically RADXA SBCs). To be a 3 star product, it should (a) boot, (2) be stable, (3) summon a Djinn to grant me three wishes.TL;DR: Works for 2 of 3 expectations - no Djinn granted my wishes.Basic functionality: For my 3A, 4A, and ROCK Pi E, these worked great. I can boot reliably. Although I try to keep any writing to the MicroSD media minimal, when writing is required, it's reliable and fast [for a MicroSD]. Solidly a 3 star product.Why are these rated at 5 star? My Radxa SBCs have been the most finicky of all my SBCs (Libre, Raspberry, HardKernal). The fact that these MicroSDs work is worth 3 additional stars, but I only have 2 to give.Raspberry Pi 3, 3+, and 4B: These are flawless.HardKernal ODroid: These are flawless.Libre Le Potato / Renegade: These are flawless.

SanDisk is a standard for data storage. I've never had a bad one. I chose the 16GB model for my Raspberry Pi Projects because it is enough storage for the Pi O/S I use, and this model is good for up to 80MB/s transfer speed. I've tried faster cards but no sense buying an ultra fast card if your reader will only read at a slower speed. I had the 98MB/s card but found it was generating some lockups...I don't know if the card was sending faster than the system could receive, but decided this card, at this price, is the perfect match of performance and price. I can plug in a hard disk drive if I need more storage; right into one of 4 USB slots on the Pi.

Over they years I have used many microSD cards in many devices - smart phones, tablets, cameras, even several Raspberry Pi SOCs (system on card) computers. Perhaps a year ago I acquired a desktop 3D printer and was pleased to see that it could operate in a standalone mode: no need to be connected to a PC or even use Wi-fi. All you need do is put the print file (type .gcode) on a microSD and use button, knob and little LCD screen to select the model and cause it to print. I took an old card from a Pi,reformated it to get rid of old stuff, and tried it. The printer didn't 'see' the card. Yet the PC could, it had copied the .gcode file to the cad! Huh? Turns out that the printer can not work with a card which has a partition, even if the partition is formatted the expected FAT32. All I needed was truly bare card, I didn't need a large capacity. So rather than really wipe the old card (carefully!) I just got this one. I removed the SanDisk 'security' software, didn't need/want it, loaded my 3D models and away it went. I've been using this card for some ime now - just had to make sure that I don't convert it to Linux file system - leave it at FAT32 if it is going to be used to feed the little 3D printer.My only complaint, and it probably isn't 'fair'. They sure make it hard to cut open the blister pack to get the card (and adapter) free. Perhaps SanDisk (and others) could put some dotted lines on the back of the cardboard indicating where it is safe to cut without running the risk of cutting the card or adapter? Going in though the side of the clear blister with (say) a box cutter or X-acto could be hazardous to your hand. Definitely not for one inexpreienced with sharp objects!

Just got it today, Setup an Headless Image of Ubuntu for my 18 core Parallella-16 (Arm arch ect) computer, Has my processors blazing at 100% and is working fine with it. I am most pleased. Doubled the speed of my system, had a SanDisk (Older Version) of the same mem chip before, it was a bit slow. SanDisk dose a good job making micros & speed most important.

Works as expected. Good micro Sd

Was able to get the micro-SDHC Memory Cards into use quickly on my Linux computer. Downloaded SD Formatter for my Mac system so that I could format / backup the micro-SDHC memory cards. It appeared that the cards I got did not require formatting OR the Linux machine formatted the card before it copied the OS onto it for backup. Either way, it worked just fine. I am very pleased with both the size ( 16 GB ) and that it worked so well without any problems or issues. I plan to buy some more of these SD Memory cards as I investigate some other Linux distributions, like SUSE, Red Hat and Ubuntu. I put a rush-order in on 3 micro-SDHC ( 16 GB ) Memory Cards and got them in quick-time.

I often buy Sandisk products because of the quality and reliability. I use these portable storage disks in cameras, laptops, and phones. I have never had any problems with this brand.

purchased for small phone .fir great