How can file be permanently deleted but still recoverable

How can file be permanently deleted but still recoverable

Use "undelete" to recover deleted files from How can file be permanently deleted but still recoverable laptop after Virus attack,Recycle bin clear,disk cleanup,Press shift del by mistake,permanently empty recycle bin,shift delete ,accidentally deleted by a mistake.

Use "unformat" to recover data from How can file be permanently deleted but still recoverable laptop after quick format,full format,accidentally formatted,reformatting,High-level formatting,Low-level formatting.

Use "recover partition" to recover files from How can file be permanently deleted but still recoverable laptop partition,lost partition,changed ,damaged partition.And if the size or position of partition is changed by format,It can not recover with "unformat"so you can use "recover partition"mode.

Use "Full Scan" to recover data from How can file be permanently deleted but still recoverable which can not be found with "undelete" and "unformat" and "recover partition",after showing an error,display as raw file system,unformatted,unknown partition,unpartitioned,needs to be formatted,or the file system is not exfat,not fat32,not ntfs.

support FAT32 EXFAT NTFS and RAW file system

support Win32 (32 bits) and Win64 (64 bits)

Support Windows XP, Windows 8, Windows 8.1,Windows Vista, Windows 2003, 2008, 2012,Windows 10,Windows 7 .

Desktop & laptops Ultrabook:HP Pavilion,HP Compa,Alienware Alpha,Lenovo ThinkCentre,Lenovo IdeaCentre,Dell Inspiron,Dell XPS,Sony VAIO,Acer Aspire,Asus Transformer,Dell Latitude,Samsung Ativ Book,Asus VivoBook,HP Envy,Lenovo IBM ThinkPad,Lenovo IdeaPad Yoga,Microsoft Surface,Toshiba Satellite

MS Office document (Word, Excel, PowerPoint, Outlook) types (doc, docx, ppt, pptx, xls, xlsx, pst, etc.),photos (JPG, PNG, ICON, TIF, BMP, RAF, CR2, etc.), videos and audios (MPG, MP4, MP3, MTS, M2TS, 3GP, AVI, MOV, RM, RMVB, etc.), compressed files (rar, zip, etc.), PE files (exe, dll, lib, etc.) and so on.

Q: “How can file be permanently deleted but still recoverable “,
why do people say that they have deleted a file from their computer but if
someone has enough knowledge or certain forensic software they can still
retrieve this file that was supposably deleted. If they can retrieve it then
it is not deleted. and when the file is supposably deleted but still in your
computer is there a difference in the space that it takes in hidden areas of
your computer

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