What is the best method to safely erase Flash Drive, Hard Disk and NAND Flash from Smartphone? [duplicate]

I am consulting here to find out how the content of a storage device can be erased so that it is not recoverable. When I say, that it is not recoverable, I do not mean that methods that are too paranoid are recommended, but rather, I hope … Continue reading What is the best method to safely erase Flash Drive, Hard Disk and NAND Flash from Smartphone? [duplicate]

Would it be viable to sanitize deleted unencrypted data with with encryption afterwards for flash storages? [closed]

Recently I had been reading up on the wear leveling mechanisms of SSDs and other flash storages.
Given that I purchase and sell a lot of used flash storages no longer needed, I’m wondering if there’s a way to maximise the effect of data sa… Continue reading Would it be viable to sanitize deleted unencrypted data with with encryption afterwards for flash storages? [closed]

Is there some way to "fully delete" received and sent SMS messages (and any other "deleted" data") on my cellphone?

I have a cheap cellphone bought about ten years ago. It has a physical SIM card. I have in-phone "deleted" all sent and received messages, but very strongly suspect that these are still there (as well as any deleted contacts) whe… Continue reading Is there some way to "fully delete" received and sent SMS messages (and any other "deleted" data") on my cellphone?