Does the Nikon d3100 use a SD card, or a Micro SD card?

The Nikon D3100 is capable of using either straight original old school SD cards, newer SDHC cards, newer still SDXC cards, and in fact CAN use (at least) micro-SD and micro-SDHC cards when mated to the appropriate full size SD card adapter, which the much smaller micro versions of the SD cards simply slide into. Sandisk sells the adapter, (I purchased mine at a local Walgreen's drugstore), it looks just like an SD card shell w/ a small opening made for the much smaller micro-SD card to fit right inside and operate just like a traditional full-size SD, SDHC, or SDXC card. One caveat though, some if not all of the micro-SD cards I've seen can't operate at the fastest read-write speeds that the newest full size SD SDHC and SDXC cards can, so if for example burst shooting or shooting long high-definition videos is important to you, using a slower rated micro-SD card might not be the best idea if you have a choice.

Nikon D3100 Memory Card

The D 3100 is a real camera, it uses SD and SDHC cards. Only wannabe cams use Micro cards.

Yes it uses SD card so this card would be fine.

It uses an SDHC card - SD high capacity.

nikon d3100 is very new camera when compared to eos 500d and it's competitor from canon is t3 . well nikon is heaver , it does not features auto-focus motor that means you cannot use the lens without auto focusing mechanism such as 50mm 1.8f prime lens . but it support better video quality than eos 500d and t3 , also on paper it outputs better image . if you want want a camera which is capable of all kind of lens you throw at it and it lighter and can shoot more pictures go for t3 and if you need something which has better video capability go for nikon d3100 , otherwise both camera offers more or less same functionality .

The camera Nikon d3100 uses: SD (Secure Digital), SDHC and SDXC memory cards

http://www.amazon.com/mn/search/?_encoding=UTF8&ta...

Approved memory cards:

The following SD memory cards have been tested and approved for use in the D3100. Cards with class 6 write speeds are recommended for movie recording. Recording may end unexpectedly when cards with slower write speeds are used.

SanDisk

512 MB、1GB、2GB*1

4GB、8GB、16GB

64GB

Toshiba

512 MB、1GB、2GB*1

4GB、8GB、16GB、32GB

64GB

Panasonic

512 MB、1GB、2GB*1

4GB、6GB、8GB、12GB、16GB、32GB

48GB、64GB

LEXAR MEDIA

512 MB、1GB、2GB*1

4GB、8GB

-

Platinum II

512 MB、1GB、2GB*1

4GB、8GB

-

Professional

512 MB、1GB、2GB*1

4GB、8GB、16GB、32GB

-

*1 : Check that any card readers or other devices with which the card will be used support 2 GB cards.

It depends..