How to erase previously deleted files
using ShredIt
Mac OS 8 or Mac OS 9 Hard Drive Cleaner

To shred the data you have previously deleted, you need to shred disk free space. Disk free space is the area on your hard drive containing de-allocated memory. This is where all the data you have previously deleted is stored, until it is overwritten by something else. If you have a lot of disk free space or a slow hard drive, shredding free space can take a while.


You could have this problem is you've done the following:
You've moved confidential files to the trash can and emptied the trash
You've used the delete function in your email program to delete email, that email is no longer in the email trash can and you want to erase the email instead
You've used a "clear cache", "erase history", "clear history" or "clear private data" function in your web browser and you now want to erase your cache or history instead
Your browser has already deleted your internet cache, internet history or other internet tracks and you would like to erase them instead
For an simple, automatic solution to the problem of erasing instead of deleting internet tracks, use NetShred, the automatic Internet Track Eraser that will erase, not just delete cache, history, deleted email and more


If you shred the free space on a disk by mistake, don't panic. Using this procedure will only shred your free space, not your data. We've made it easy to shred the free space of a disk and more difficult to shred the contents of a disk. This is intentional, so that you don't accidentally shred the contents of a disk (i.e. your data).