You can view and download donations you have received by logging in and going to My Givealittle > Transactions > Donations Raised OR on your Page Admin panel which you can see when you're logged in, and looking at your page.
(For Project pages, all-or-nothing pages which receive Pledges instead of Donations, you will need to go to My Givealittle > Transactions > Pledges Raised instead.)
From here you can: