Where do the deleted files go part2?

Question

i am sorry for my english.
just like the title.
i just want to know where do the deleted files go? for example . i deleted a file using shift delete and it will get deleted instead moved to recycle bin?

the real question is.
if i had 20 hard drive and its full..
so i deleted a files so i can copy a data again.. lest just say it has 10 free space after deletion..
but i can recover it again using a software.
in another word the files didnt really get deleted.. but its just the address of the files has been moved/replaced.. then i copied the files again so the hard drives get full again. if the hard drive has 20gb capacity and then i deleted a files to make it 10gb free space then i copied a files so the hard drives will get full. so in another word the hard drives didnt really has 20gb capacity if i can recover the deleted files before right?

Answer 1

You are right. Its not something people really think about, most people just think, if I delete a file, it will go to the recycle bin. I can remove either permanently delete it, or restore it back to the computer. If I shift delete, it will automatically permanently delete it, skipping the recycle bin and cant restore it back to the computer.



But, as you said, you can recover it using software. How does that work?



The way deleting files actually work, is that there is a table of contents (TOC) (the addresses) on your hard drive, that lists all the files in your drive. When you delete a file, the computer is just actually removing the filename from the table of contents, but the actual file data still stays on that part of the drive, physically (so to speak) on a specific sector of the drive. If you copy another file onto the drive, and the file covers up the data that the file was on, on that part of the drive, the old file will be unrecoverable. If you copy another file onto the drive, and that new file doesn't cover up where the old file used to be, you can use software to recover the old file.

Answer 2

Each directory or folder holds a list of file names in that directory and pointers either directly or indirectly to the actual blocks on the disk where the data is stored. The disk includes a list unused blocks on the disk that are used when you store more data on the disk.



When you delete a file to the recycle bin, the original file name, its location and the list of blocks holding the file are moved from the folder where the file was stored to a special folder - the recycle bin. When you delete the file 'permanently' the blocks are added to the list of unused blocks. Unless the filesystem is one that specifically wipes blocks when a file is deleted, the data remains in the disk blocks until the blocks are reused and their contents are overwritten.



This is for a hard disk. With a SSD (Solid State Drive) if the drive supports the trim operation, then the data blocks are wiped when the file is deleted. This is because a SSD requires a block to be wiped before new data can be written. Systems using a SSD will wipe the deleted blocks in advance so that this operation is already complete before the write of a new file is required.



Recovery of deleted files from SSDs is not possible if the drive has been trimmed.

Answer 3

When you deleted a file, the file entry point is deleted and hence the file is not accessible. However, the file raw data are still there. So software like Asoftech Data Recovery can still scan and collect all the data and get back your files.

Answer 4

thank you so much guys.. now i know.. thats why when i use recovery software there's a file status whether its good or poor, if its good then it can be recovered in a perfect condition its because the deleted data in the hard drive block is not yet overwritten..

so its yes.. hard drive has an extra capacity for the deleted files will be placed.

thats why last night i tried to double my flash drive capacity from 8GB TO 16GB using SDATA tools. and when u copy a file until its full and delete it or format it like 2/3 times the data will be unrecovable.



MYSTERY SOLVED.