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: A proprietary format used for seismic survey data in geological applications. If you'd like, let me know: Did these files come from a mobile phone vault app? Do you still have access to the original device and PIN ? Are you seeing these files on a PC or a smartphone ?
The extension is most commonly associated with KeepSafe , a mobile application used to hide and encrypt photos and videos on Android and iOS. When you "lock" a photo in KeepSafe, the app renames and encrypts it as a .ksd file to prevent it from being viewed by standard gallery apps. ksd file to jpg converter
Many developers have published KeepSafe decryption scripts on platforms like GitHub. These scripts reverse-engineer the app's encryption algorithm using your original account details to batch-convert folders of KSD files back into readable JPGs. : A proprietary format used for seismic survey