800MB? Could you imagine if each picture was that big? lmao
an 8MP JPEG will only be a couple MB. There's compression involved in shooting JPEG.
My 12MP RAW photos from my Micro 4/3 camera are about 14MB in size. But if I shoot in JPEG, the file sizes are multiple times smaller.
Don't worry about filling up your internal storage with photos from the phone's camera, you'd have to take thousands and thousands and never remove them.
A decent 8MP camera (i.e. Galaxy SII) will shoot full resolution pictures between 3 and 3.5MP each. That's pretty big. A camera that compresses the image more may be able to save some space. The 12 MP camera on the Sony Xperia ion I had tok pictures around the same size as my Skyrocket, but compression was higher. The Vivid's 8MP camera was on par with the Skyrocket for output image size. That's fairly large. No smartphone camera shoots RAW so that's not worth mentioning.
Available Space will be a little over 5GB, which is not a lot of space - borderline unusable amount of space unless you're on an unlimited data plan, don't go to any highly populous destinations (where HSPA+ falls flat on its face, making a mockery of "the cloud"), and almost barely use your phone. I went to the Zoo last month and the HSPA+ connection was so bogged down that I could barely load Google.com on my phone. I ended up putting it in Airplane mode, which renders the cloud inaccessible.
Add up your Pictures - both sideloaded and taken, Videos - both sideloaded and recorded (720p is heavy enough, 1080p can be something like 100MB or more per minute of footage in size), Apps, Games (some of which require significant download sizes to play them), Documents, Music - unless you want to hedge your bets on Google Music, however when the cloud is inaccessible/speeds are too slow you are going to be SoL (or have your battery destroyed while others put their phones in Airplane mode and use 10% of their battery in 2 hours of constant music playback).
The 5.x GB space becomes a huge drawback when you consider all of that.
Take it from me. I had an 8GB iPod Touch. You do not want a phone with only 8GB storage. I am not saying don't get the phone. I am saying save up another week or two and just get the 16GB variant and save yourself the potential (or eventual, in many cases people think it isn't a problem but they simply haven't fully evaluated their requirements and use cases) headache and/or buyers remorse (of that specific storage capacity N4).