I've just made a bootable usb on windows7, and now I want to replace my windows7 with Ubuntu. When I choose the option replace windows 7 with Ubuntu, I need to select a drive. Since I have only one drive in my desktop, I must use it. But on my windows the drive is partitioned into a C and D drive (both 500GB). I put all my files on the D drive, so I can still use them in Ubuntu. My intention is to install Ubuntu on the c drive from windows, but when i click on advanced partitioning tool, I see that there are four partitions:
sda1(ntfs): 14.7 GB, sda2(ntfs): 104.9 MB, sda3(ntfs): 492.7 GB, sda4(ntfs): 492.7 GB
My problem is that I don't really know what the first two partitions are, and which one is the c:/ drive from windows. I guess it is the third, but I must be sure because otherwise all my data is lost. What exactly do I have to do to just install Ubuntu on one partition and keep another partition with my files (the d in windows)? Also I don't really know on what type of filesystem Ubuntu has to be installed on(fat, ntfs, ext,..). The desktop that I'm working on is a Acer Aspire AX3900. Thanks (and sorry for my bad English).