Toshiba external hard drive DTP110

@jerrycremer this "can't be accessed because the parameters are bad or something" could actually be pretty important. It might lead us to what causes this error. Assuming that this is not a mechanically crashed drive, you would need to get a PC that is identical then the one for your HDD. Then you need to transplant that PCB to your HDD as well as the BIOS IC which need to get from your old PCB to the new one. Very similar to what was done on here Hitachi GST Deskstar HDS721010CLA332 Hard Drive Controller Replacement

If this is a mechanical failure, the only thing you could try is to transfer the platter from the old drive to a new case. Usually you would need to do this in a clean room and it's a bit of a PITA to do that. Now, depending how important those files are to you, you may want to consider a commercial data recovery service. Not cheap but that will be up to you.