Reviews are lacking information. Want to hear about saving presets and how much on board storage does one get.
AJ has talked about a new OS. How much needs to be fixed.
Let's hear more detail. Lloyd

Here is memory:
Internal Storage: SSD Card 16G.
External Storage: Removable SATA 2/3 2.5 HD. USB: 3 Host + 1 device.
Internal is largest of any arranger that I know of, by far.
External is unlimited.

It is quick and easy to save edited styles, registrations, sounds etc.
You cannot save presets (overwrite factory styles or sounds). You just edit them and save to User memory with the same name or pick your own name.
The OS seems very stable, intuitive and fast.
I haven't found any "bugs" that are worth mentioning, but there are some updates and fixes to make things even better, that AJ is working on.

Ditto to what Don said, ...SD7 is very stable, Display is BIG, BRIGHT and easily readable, The OS is very easy to-operate and very logical in it's execution. You can save changes, edits etc on the fly in live play with no glitches or pauses at all something I couldn't do on my S-950 while playing. Jumping back and forth between Reg style play & Mp3/Smf song play is seamless with just the touch of one button which I really like. Sliders are of top quality built also not those shaky ones on some keyboards...navigation on the SD7 is a players dream & one of my pet peeves when I perform & the SD7 seems to so far addresses this nicely for my needs. As was said before the Voc processor and VH is on par with TC Helicon, sounds really good with excellent tracking. Speakers are the loudest I've heard on an Arranger KB, for those occasions when your in a very small room or small NH scenario the KB alone will cover it all by itself. I'm also getting used to this nice keybed feel as I transition from the featherweight S-950 touch to a more substantial feel with the SD7 it feels more like a Fatar KB. Little things like a speaker on/off switch in back is convenient & 3 front USB ports too. I also like that holding down many of the buttons, or screen Icons will activate popup menus for editing instantly. Playing live on screen you can SEE ALL 4 OTS Sounds for instant access at the touch of the icon in live play also besides all the fills, breaks too.
I'm learning more each day as I play it and set it up.

Stay tuned.

SD7 AJAMSONIC:-
Internal storage/RAM:- 64GB + 32GB = 96GB!!

I have to second both Don's and Donny's post. I am a complete Ketron keyboard newbie and after one week I am ready to give it a shot on it's first gig on Friday. I have about 50 of the most requested songs setup as registrations, have learned to tweak style parts, convert older ketron styles for use on the SD7, adjusted the EQ settings, and generally feel comfortable moving around on the keyboard. I don't sing so have not played with the VH yet. I like very much the ability to easily see on the great touch screen the 4 RH OTS voices and change them on the fly. But, it doesn't stop there- you can access hundreds of voices on the fly and use them too if you wish. Actually pretty neat.

Deane

I hear you Deane,.....Good Luck on your SD7 maiden Voyage in the Trenches.
I know Don M is already there playing it.
I should follow suit very Soon also.

Hey guys, I recorded almost four hours of audio last night. I'd like to say it sounded great, but I can't.
BECAUSE I plugged the input to the recorder into the output jack and got four hours of silence!
I hate it when I have to set up, play one night and tear down, because it's easy for something like this to happen.
On a good "note", I have had numerous unsolicited compliments from regulars about the sound of the SD7. I didn't tell anyone I'd made a change, but they noticed.
Not that the Korg didn't sound great, but the Ketron is different, even more live-sounding, and I suppose it is refreshing to do some of the same songs that are requested with a different style or feel.
I will be off until next Wednesday so will spend a couple hours each day at least doing more setting up and tweaking.

I just found that there is live efx EQ sliders on screen for Mp3s... Styles... Etc, ...
So kool.

You refer to the SD card as internal memmory, so i could have 12GB of sounds and samples on the SD card and have direct access to them?

I just copied and pasted from the manual. I understand that the internal drive is a solid state drive.