This will be added as a functionality in the next release, thanks for the hint.

Really good point. Data Deletion on SSDs and NVMEs are handled differently. (I dont really know about SD Cards but it may be similar)

NVMA/SSD Data Deletion follows 3 Steps

• You delete / overwritte a file (overwrite does not really mean the old content is lost on the ssd, it may be in the NAND storage)
• The TRIM Features starts periodically and markes the data / content you deleted as erased (this functionality can be triggered by software, i will implement this trigger)
• The problem is the last step, Garbage Collection: This will erase the data finally, and then the probability is REALLY low someone will restore it. Before garbage collection is complete, there are ways to restore with advanced techniques or help of the manufacturer.

So best is to activate the TRIM Feature when Its implemented on the next update, but this feature will also be auto-executed by the windows system. - Best is to wait hours (its hard to know when garbage collection is finished) after the trim feature has been enabled to be sure garbage collection has deleted the content/files.

But for security measures it still can help to delete the data, even if the garbage collection is not finished. The risk for recover depends than on how many resources the opponent is ready to acquire to get to that data. It will make the recover process difficult without special forensics software etc.

Best and most secure way is to encrypt your data at all so none one can access even if they have the files.

Yes this would be more secure and recommended

I made an larger update and the software is now ready to use :) At the time this post was made it was just kind of a storage for the project until its done :-D Hope you like/can get use of it.