An excellent idea to keep your hours backed up on computer. Have a look at this thread to see what happens when it all comes apart...
http://www.pprune.org/forums/showthr...72#post1759272
Do a search for pilots logbooks and the net will throw up heaps of choices. Some attract a small fee but in terms of overall flying costs it is nothing.
Farrell, hope the preparation for your PPL is going well as March draws nearer!