Permanently deleted data doesn't have a defined location where it goes after deletion. Once you delete data from your device, it's marked as free space, which means that the space it occupied is available for new data to be written over it.
Here are some reasons why permanently deleted data cannot be recovered:
1. Overwritten data: When you delete a file, the operating system usually doesn't erase it completely, but rather marks it as free space. However, if new data is written over the space where the deleted file was stored, it gets overwritten and can't be recovered.
2. Encryption: If the data was encrypted before deletion, the decryption key is needed to access the data. Without the key, the deleted data remains inaccessible.
3. File system damage: If the file system is damaged, it's impossible to recover the deleted data. The file system is responsible for keeping track of where files are stored on the device, and if it's damaged, the location of the deleted data can't be determined.
Overall, it's hard to recover permanently deleted data, and if it's possible, it often requires special software or professional data recovery services. Therefore, it's essential to keep regular backups of crucial data to avoid permanent data loss.