How to Wipe Free Space

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Why do you need to wipe free space? Residual data, known as Data Remanence, continues to exist after common activities, such as 'delete' a file or move a file.
Watch this video to learn how to wipe free space with BCWipe. 

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How to Wipe Free Space on Hard Drive

In this video tutorial, we’ll show you how to wipe free space with BCWipe.

Residual data, known as Data Remanence, continues to exist after common activities, such as 'delete' a file or move a file.
The Wipe Free Space task is used to completely remove all traces of unwanted files beyond forensic recovery.

To clean free space on a hard drive, BCWipe creates temporary files with a wiping pattern inside. These temporary files overwrite old data written to the disk. BCWipe accomplishes this by overwriting free space without allocating all available disk space at once. By doing so the drive never gets a condition of 'Low disk space'.

Open BCWipe Task Manager.
Click on the 'Tasks' menu, select 'Create new task' and then select 'Wipe Free space'.
From the list, select the drive you want to run the Wipe Free Space task. Or also, you can exclude drives by selecting from the 'Exclude and hide' option.

Free space wiping is a time-consuming task.
To wipe free space in less time, click 'Manage Reserved Space'. This option allows you to lock up a portion of free space after it has been wiped.
Since the wiped data in Reserved Space is considered occupied, it will not get used or "dirty", so that space will not need to be wiped every time.
The reserved free space will be automatically released and made available in case the disk starts getting full. Select a percentage and click 'OK'.

Let’s now select the 'Schedule' tab.
Here you can set the starting time for the wiping task.
Apart from the regular scheduling, you can also select the task to start 'At user Logon', 'At Startup' or 'At User Logoff/Shutdown'. 

Let's move on to the 'Wipe options' tab.
Here you can select from the 14 different wiping schemes.
BCWipe also allows you to create your own wiping scheme. Click 'Edit' to start the 'Wiping Scheme Editor', click 'New', choose a name for your scheme, and click 'OK'.
Now start adding from the 'Pattern list'.
After you are done click 'Apply' and then 'Close'.

Below the 'Wiping scheme' option, you can see the 'Wipe file and directory slack' options.
File slack is the disk space from the actual end of a file up to the end of the last cluster used by the file. The space may contain data from other files previously written there.
Directory slack may also contain the name of the deleted file, as well as other deleted data.
Check the box for 'Directory slacks' if you want to get rid of this unwanted data. 

Wiping a file and directory slacks may be a time-consuming process, especially if there are many files and folders on the disk. For certain files and folders that you will keep for long time, you could wipe their slacks just once, and then configure BCWipe to skip these directories. To create a list of skipped files and folders, check 'Use skipped list' and click 'Edit'.
Now select the options as desired. 

MFT or Master File Table is a reserved space on an NTFS disk, where the file system stores names and attributes of files. Small files may reside inside MFT completely.
It is recommended to enable this option for complete security.

NTFS is a journaling file system and it uses the NTFS Log to record temporary data for all files you were working with. The transactions log file is used to restore the file system in case of a failure.

Next, click on the 'Log file' tab. 
Check the 'Use log file' box if you want to have a logfile afterward.
Logfiles can be viewed in 'LogView' or 'Notepad'. Now go ahead and click 'OK'. 

If the selected time for the task was current, then select the task and click the play button.
This will start the process immediately.

You can also just click on the drive from Windows explorer and select 'Wipe Free Space'.
The task will follow the last selected settings to wipe this drive. 

CONGRATULATIONS! You have successfully wiped free space with BCWipe. Thank you for watching! We hope you will be satisfied with our software.