Which feature to use?
From the main window of ByebyeData Eraser, you can see many features are listed, it is capable of erasing files, folders, free space, drives, and disks, besides, and it is also able to create bootable media when you want to erase the entire disk along with the operating system.
But which feature shall I use to make data clean?
Well, that depends.
Take the files and folders function for example, you can add individual files and folder to the list and then erase them, although this feature has no limitations of the files folders number, it's used often when you have a small amount of them to erase, and when the amount is huge, we'd recommend to erase the entire drive instead.
As for the erase free space function, we'd like to say that it's the best option when you don't know which function to use after you had already deleted unwanted data. What's more, erasing free space won't hurt the in-using data and the stored data, it only handles the free space, or the unused space, or the deleted space on the hard drive, so performing this function won't need to backup data, since it won't touch the existing files. And erasing free space don't need a bootable media, you can directly run this function even for C Drive.
Then comes to the erase entire drive, entire disk function, which are mostly used under the situation that you want to get rid of old computer, sell or donate it to others. To erase the entire disk you can erase everything on it so that no data recovery software can get any of the sensitive data back. Another situation you may use this function is when the computer is affected by virus, malware or any other software you though might slow download the hard drive and you want to a clean install of operating system to make the device runs like a new one.
In the process of erasing the entire hard drive, you'll use the Create bootable media function.
So, to sum up, there're four erasing features and one additional function to serve the main functions. Not that hard to determine which feature to use on different situations, right?