You may try the following methods to delete unwanted data: simply delete the files or format the partition. Actually formatting and even deleting a partition leaves hard disk sector contents the same, certain amount of information can still be there on your hard disk, unauthorized access to this private information can cause data leakages. So you need EaseUS Partition Master to wipe hard disk unallocated space.
1, Download EaseUS Partition Master and install it on your computer.
2, Launch EaseUS Partition Master and go to main screen.
3, Select unallocated space in EaseUS Partition Master main window, right click the unallocated space and choose Wipe data.
4, In the Wipe data window, enter a number of times to wipe the unallocated space.
5, Click Apply.
Tip: This feature is available to basic disk.
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