Internal disk needs repair
So as i was updating my itunes folder stored on my time capsule (which i use primarily as an external hard drive), it decided to stop working. I checked airport utility, and it said it needed a few firmware updates, so i did those, but then after that it stayed flashing amber with a status of "internal disk needs repair".
Currently, i can still connect to the capsule via wifi and get internet, but the airport disk wont show up in finder at all under the "shared" section. HOWEVER, when i connect a usb to the time capsule, i can see the USB disk under "shared", but still not the time capsule disk. The airport disk does however show up in airport utility, and i have the options of erasing or archiving it.
I've already tried unplugging the capsule, turning the power off overnight, soft/hard resets (but not a factory default reset). I really don't want to erase my data as there are thousands of songs/other things on there. I've searched everywhere on the internet for an answer but i can't find a question from someone in the exact same situation i'm in..
So my question is, is there any way to extract the data from the time capsule disk so i don't lose all of my stuff? I'm not too fussed about replacing the time capsule/buying a different type of NAS, so i'd be willing to void the warranty if that is my final option - i'd just really like my data back.
Thanks in advance.
Time Capsule 802.11n (4th Gen), OS X Mountain Lion (10.8.4)