They are able to hold the maximum for standard SD cards, which is 2GB. SDHC cards will not work with official cards, but some clone cards have SDHC support.
0,The R4 does not have an internal memory instead it runs on Micro-SD cards,so the R4's GB maximum is the maximum of the Micro-SD,I read somewhere the biggest Micro-SD you can use it 32gbs.
R4 cards can be real ds cards too, but some are better then others. I can recommend the iEdge card for DS, as it's simple and stable and will run anything you need it to. I got mine from dscardworld.com
Well, that depends. Most memory cards are 4 GB (for about $10 on Dealextreme.com) and can hold about 60-80 moderate-sized games. For $16 though, (on Dealextreme.com) you can get an 8GB memory card which can hold about 180-200 DS games.(I recommend it). But in order to use those DS games, you have to buy an R4 ($8.00 from Dealextreme.com) to transform the data from your computer into a data form that can be read by the DS. (By the way, I have an R4, and they are AMAZING!) ---This answer is courtesy of--- MegaChunkeyMonkey
R4 and similar cards tend to be bought online (no longer on eBay or Amazon).
No. white R4 cards are older, but should have same functionality.
wal-mart ,target,best buy,maybe game-stop,
All r4i cards work on 3DS. But you need to understand that the R4 cards does not work on the 3DS 3D games and only for DS games. For the first generation R4, it does not work on the cards, please refer to 'R4i cards' , 'Acekard 2i' , ' M3i zero'.
What!? A DS R4??? Well i presume you meen 'how do you make the DS have an auto boot R4?' (not possible!) Just buy an R4, theres no way you can have a DS what runs roms without an R4 (or any other flash cards) You can buy them here: http://www.r4i.co.uk/ (for both DS and DSi)
if you mean on DS, insert the game cartridge and press the rightmost button, if you have a separate GB game cartridge.
No, the R4 will only play Nintendo DS Games and Homebrew.
You can get R4 cards at your local market or on the internet, however you can not get them at your local shopping center because they are illegal.
You can get them off Amazon, but the new versions are called 'EDGE' cards, so it might not say R4 in the title.