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Micro SD cards

Hi, I need to get a couple of Micro SD cards for my tablet (Asus Memo Pad HD 7) and GPS (Garmin Nuvi 40 LM). I've been looking on eBay and they seem to only have Micro SDHC cards with Micro SD adapters. Also, they have different classes, like Class 10, 6 and 4. What are these different classes and should I be worried about them?

Thanks in advance.

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( 6 comments — Leave a comment )
revchris
Jan. 20th, 2015 02:05 pm (UTC)
Asus' website (http://www.asus.com/us/Tablets_Mobile/ASUS_MeMO_Pad_HD_7_ME173X/) says that your tablet has a "Micro SD slot Expandable by up to 32GB."

MicroSD cards technically only exist to 2GB; if your tablet goes to 32GB then it supports the MicroSDHC (MicroSD High Capacity) standard and you can use any MicroSD or MicroSDHC card without needing an adapter.

The higher the class rating, the faster the read/write speed on the card. The faster the card the faster you can upload or download and the faster you can save pictures when taking them with the camera. I try to buy Class 10 cards for most devices.
moonbladem
Jan. 21st, 2015 03:09 pm (UTC)
OMG thanks for clearing all that up! :D

You've pointed me in the right direction so I know what to get now.

One more question... if I get a card with a higher capacity for my tablet (in this case, higher than 32GB), will it still work? Or should I just stick to 32GB?
revchris
Jan. 21st, 2015 03:11 pm (UTC)
It might work, or it might not. It largely depends on how they wrote the size limit into the operating system.

For compatibility reasons, and for trying not to have it break later, I'd stick to 32GB for now.
moonbladem
Jan. 21st, 2015 03:22 pm (UTC)
OK, I'll do that. Thanks once again for the sage advice. :D
fyremoon
Jan. 22nd, 2015 12:08 am (UTC)
SDHC memory cards are formatted to FAT32 as standard, so any device that uses the FAT32 file system can read and write to them, but there is a physical maximum that file system can access, which is 32GB.

SDXC memory cards are formatted to ExFAT as standard, which means their maximum is 2TB. Unfortunately, systems that don't have support for ExFAT can't read them and if they are formatted to FAT32, only the first 32GB can be read.
moonbladem
Jan. 23rd, 2015 01:17 am (UTC)
Further clarification that's extremely helpful to me in my understanding of the different cards. Thanks so much for that! :D
( 6 comments — Leave a comment )

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