I’m confused. I’ve just bought an HTC Desire 510 mobile phone that takes a microSD card. While researching on the internet I came across the statement: “An SD card reading device will not support the newer SDHC standard” (http://www.diffen.com/difference/SD_Card_vs_SDHC)..) So my phone needs a microSD card, not an SDHC card. However, on this site (the Sandisk site) all of the cards listed under SD cards are either named or described as SDHC or SDXC. There don’t appear to be any SD cards! I would be grateful if someone could clear up my confusion.
An “SD” card is sometimes used as a generic term to describe a memory card. When originally developed, they were quite small (by today’s standards). Over the years, techology and manufacturing has advanced to allow larger memory storage on these cards.
In essence:
SD > up to 2GB
SDHC > 4 - 32GB
SDXC > over 32 GB
Both the SDHC (High Capacity) and SDXC (X-Treme Capacity) are different formats than the old SD format. Newer devices that use these cards are usually backward-compatible, but not (usually) forward-compatible since they were manufactured before the newer card technology was developed.
Bottom line for your situation is to check your phone’s specs to see waht SD format it supports. A quick Google search on your phone model revealed the 1st hit as the manufacturer’s web page on this phone. If you click on the Specs link, you’ll find all the technical specifications including those for the Memory.
It says:
Total storage: 4GB/8GB, available capacity varies
RAM: 1GB
Expansion card slot supports microSD™ memory card for up to 128GB additional storage (card not included)
Note the last line. Your phone does indeed support (ie. can read and use) any card up to 128GB which includes SDXC. So you can use any micro-sized memory card your little heart desires (and your budget or wallet can afford). 
Hope this clears things up and helps.
That does indeed clear things up Tapeworm. Many thanks for your very detailed reply, and for doing the online research that makes your reply specific to my situation. Your reply couldn’t have been clearer … many thanks. Now, off to buy a 32GB SDHC!
Your welcome. All this technology is indeed confusing when first encountering it, huh?
For getting best solution to your confusion is directly contact with HTC Mobile Phone Support Community , they will provide you full assitance support or try second way that is to check Htc Desire 510 Manual and read Storage Section from it. I hope this section will surely help you and clear out your all confusion.
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Your confusion is completely understandable because the naming conventions for memory cards can be incredibly tricky! The quote you read about an “SD device not supporting SDHC” is only true for very old devices made before 2006 (like old digital cameras).
The good news is that your HTC Desire 510 is a modern smartphone that fully supports the newer and much faster microSDHC and microSDXC standards (up to 32GB or more, depending on the card brand). When a modern phone specification says it takes a “microSD” card, it is just using “microSD” as a general catch-all term for the physical size of the slot, not the storage technology. You can absolutely buy any SanDisk microSDHC card, and it will slide right in and work perfectly.
Just like choosing the right card for your phone, precision matters in self-discovery too. When you use our Matrix of destiny Calculator, people often wonder if the “general” calculation is as accurate as the “specific” one. Much like the confusion between SD and microSDHC, people often mistake the Destiny Matrix for a generic horoscope. However, our tool is built on precise mathematical algorithms—not vague predictions. Just as your phone needs the right card format to store data correctly, your life path analysis requires an accurate calculator to interpret your specific birth date data correctly. When the tool is designed with the right “technical standards,” you get reliable, high-speed insights instead of just guess-work.
More recently there is now SDUC for cards > 2TB
