The first step of data recovery

Data will be saved if more easily observe the following.

Do not store important files on the system partition, for example, drive C, in many cases I find that many users, especially MS word and other similar direct clicks diskette icon, which will be stored in the folder "my document" which is located in the partition system, for it to move only partition with a right-click the folder "my document" after the move and click the button to move a partition that still has a lot of space.
Do defrag regularly; files stored sequentially in the cluster, this occurs only if many partitions are available. Removal and writing regularly drive on the file will cause the split, as in the example below:

(1) (2) (3) (4) (5) (6) (7) (8) - should represent a small 8

(1) (2) (3) (4) (5) (6) (7) (8) - now files (2), (4), (7) and (8) were deleted

(1) (9) (3) (9) (5) (6) (9) (9) - the disk is fragmented if a larger file is stored

If a file is deleted, then the new data will fill an empty cluster. If new data is greater than the old data, the data will be placed in a related but fragmented. When reading fragmented files, the head moving "jump" that will cause a decrease of read & write speed that will affect overall system performance. So that the head can read & write in effisien, do defragmentasi regularly, after defragmentasi, the files will be placed in a sequence, as in the example:

(1) (9) (9) (9) (9) (3) (5) (6) - after the drive is defragmented

Non-fragmented disc will increase the level of efficiency saving data, because the whole data will be stored in a first cluster file system & improve performance.
Do not store data on the drive with a small, because a large fragmentation occurs.
Data recovery software must be installed on a separate drive from the target drive, if it does not happen will be overwriting the data that will be saved and the data will be difficult to recovered. Do not perform any activity on the target drive, including store & delete files, and will be better if the recovery software installed on the 2nd hard disk.