Patent ID: 7401194

Claim:
A data backup system for backing up a data file comprising: (a) a source device having a source processor and an input device, the source processor being configured to: (i) determine whether the data file has been modified at the source device; (ii) upon determining that the data file has been modified at the source device, determine at least one modified data block associated with the modification to the data file; (iii) transmit the at least one modified data block from the source processor over a communication network; (b) a target device connected to the source device over the communication network, said target device having the target processor configured to: (iv) receive said at least one modified data block from said source processor over the communications network; (c) said source processor and said target processor also configured to determine if the input device is active simultaneously with at least one of (i), (ii), (iii), and (iv), and if so, interrupt at least one of (i), (ii), (iii), and (iv), until the input device has been inactive for a predetermined period of time.