Had to get a 32gb SD card for my 3DS. That's about it. Although, I do have only 7gb left on my Wii U, and wondering if that's going to get me through the generation without having to delete other things to make room.

A 500 gb for my ps3. But for my ps4 the standard hdd is enough. If i switch it is for a ssd for faster speed but the same storage size.

My vita come with a 8gb card and that is enough too. Play it, delete it.

No. I've never played more than 3 games at once on console so it was a non-issue last gen.

3DS: I switched to a 32GB SD card, and I have actually filled half of it already.

Wii U: I have the 32GB model, and put in a 16GB flash drive. I think I will have to upgrade that soon.

Also, change the word "memory" to "storage" in the thread title.

I was one of the 5 people that bought a white Wii U at launch, so I kinda needed the extra memory even though the only digital games I buy are eShop exclusives or VC. I only got 8 more gb's because I never download full titles digitally

Upgraded the PS4 to a 2TB as soon as I bought it. Actually, downloading the April PS+ games pushed me past what the regular HDD would have been able to hold.

Nope, my consoles memory chips are soldered and can't be upgraded.

As for storage though, I have upgraded my PS4 HDD.

When I filled my 60GB 360 - I traded up for a 250GB Slim. My PS4 still has quite a bit of space but I swapped the meager 4GBs out of my 3DS for a 32GB card. The Wii U was something I went into knowing that I'd have to put an external on. The time is coming when I'll have to do so - despite Nintendo being wizards with file sizes.

EDIT: I buy most of my games retail, in a vain effort to avoid storage upgrades. 

I have a 2tb hdd for my wii and I upgraded my fat 60gb ps3 to 160 right after I got it. That all though. Put a 500gb in a buddies ps3.