Your data is safe.
Before shipping, copy all your data, materials, and information.
Then remove them from your device. Once the equipment is processed, you will no longer be able to recover them.
The technical operator of your device maintains the highest technical and technological standards. The activities of these operators must be compliant with the principles of the European standard DIN 66399.
This standard was developed by the Standards Committee for Information Technology and Applications. Therefore, at the first restart, all data storage is "wiped" and recovering the data stored on them becomes impossible.