I have this 4.5GB drive on my SE/30:

I have it partitioned such that no partition is greater than 2GB, and I do that so System 6.0.8 can see all the partitions and read/write to them. Moreover, I have 2.5GB of data on that drive, and I've not put every single piece of vintage Mac software on it yet. However, I will admit that you probably won't find more than 4GB of vintage Mac software (for Systems 6 & 7) out there, unless you just start dumping numerous CD-ROM images on your drive.
As to RAM, I have 128MB in mine, but unless you run Photoshop, you really can do with less. Even 64MB is rather big. If you want a lot of RAM but don't need to max it out at 128MB, you'll do just fine (even when web browsing on your SE/30) with 32MB. I know because I have run my SE/30 for in many different RAM configurations, running each for many weeks at a time, trying different things.
And if you like to keep an SE/30 mostly stock yet run as fast as possible, an 030 accelerator (that's right, 030, not 040) will accomplish that and retain complete software compatibility. Here is the one I use:
http://www.flickr.com/search/?w=66071596%40N00&q=Micromac&m=text
Yes, they are still for sale, brand new in fact. Just read the descriptions under my Diimo photos for details on that.

I have it partitioned such that no partition is greater than 2GB, and I do that so System 6.0.8 can see all the partitions and read/write to them. Moreover, I have 2.5GB of data on that drive, and I've not put every single piece of vintage Mac software on it yet. However, I will admit that you probably won't find more than 4GB of vintage Mac software (for Systems 6 & 7) out there, unless you just start dumping numerous CD-ROM images on your drive.
As to RAM, I have 128MB in mine, but unless you run Photoshop, you really can do with less. Even 64MB is rather big. If you want a lot of RAM but don't need to max it out at 128MB, you'll do just fine (even when web browsing on your SE/30) with 32MB. I know because I have run my SE/30 for in many different RAM configurations, running each for many weeks at a time, trying different things.
And if you like to keep an SE/30 mostly stock yet run as fast as possible, an 030 accelerator (that's right, 030, not 040) will accomplish that and retain complete software compatibility. Here is the one I use:
http://www.flickr.com/search/?w=66071596%40N00&q=Micromac&m=text
Yes, they are still for sale, brand new in fact. Just read the descriptions under my Diimo photos for details on that.