This question is similar to Does an equivalent of Time Machine exist for Windows?, with one difference:
The files I want to back up are on a network drive. The computer on that network drive is running Windows XP. I want to back up data on Windows 7.
How would I do so?
I'd like something similar to Mac OS X' time machine. So copy of data every hour, day, week. Then thinning out, data gets deleted automatically as time goes by. For example, the data for last day is kept as hourly snapshots. For last week, as daily snapshots every day. And for last month as weekly snapshots.
How can I achieve this?