Memory devices are storage devices used to store or hold the data in a computer or in other electronic devices. There are 2 types of memory devices. They are primary memory and secondary memory. Primary memory also known as volatile memory is a storage area it is directly connected to the computer and from this data can be access quickly, it stores limited amount of data and it is expensive. Whereas secondary memory also known as non-volatile memory and it’s not directly accessible by processor requires I/O channels. Data access is slow compared to primary memory but they can store large amount of data and less expensive. Examples for secondary memory are hard disk, CD, DVD, flash memory, floppy disk, magnetic tape, punch card etc.
Secondary memory devices can store different kinds of data like text files, audio files, video files, photos etc. We can access the stored data even after powering off system. Data doesn’t lose from secondary memory until and unless we delete explicitly from the drives.
Different ways of losing data from secondary memory are using delete key, using shift delete key combination, formatting drives, improper system shutdown, sudden power failure sometimes causes data lose from memory, storage drive failure, virus infection, data corruption, abruptly removing storage media from computer sometimes leads to data loss, re-installing OS, physical damage to the drives, drive theft and many others.
Sometimes computer user wants to delete the unnecessary/unwanted data stored in secondary memory to keep free memory area or when they don’t want to disclose their personal data to other users of the same computer or when selling or donating drive to others etc.
In a computer if a file is deleted by delete key, operating system doesn’t actually delete file content from the disk and deleted file resides in recycle bin later they can be restorable. What actually happens when user deletes file using shift delete key combination is file doesn’t go to recycle bin and the user can’t access the file but still possible to access the data. Even it is possible to recover data from formatted disks, corrupted drives, from virus infected files.
What operating system does when file or data deleted using delete key, shift delete key, by formatting, re-partitioning, deleting partition is, it only erases reference from address table used by operating system to access the file or data and doesn’t wipes data from storage device. It can be recoverable using data recovery software’s until it’s over written by other files or data.
The solution to recover files after shift delete need to download and use data recovery software because shift delete operation doesn’t leaves any trace or link to the file. It requires special hard drive scan algorithm or data recovery application called Remo recover (Windows) Basic Edition to search the entire drive for the file and to recover it.
USB drives are storage devices consists of flash memory with an integrated Universal serial Bus interface. Storage capacity varies from 2GB to 1TB or more as devices are upgraded. When data or file deleted from USB drive file doesn’t go to recycle bin and we can’t regain access to the file. To recover files deleted from USB drive need use data recovery software for Remo recover (Windows) Basic edition which helps to recover files easily and efficiently.