You need FileMaker Go to save images directly to a container field. You can use FM Go on a mobile/tablet device.
You might be able to use some kind of Batch-script that copy your image from another software into your container field, but there is no script step that works like that on FileMaker Pro
Insert from device is only for mobile devices (Go).
I don't think it can be done without 3rd party software.
thanks for advice... if you know of any third party software id be pleased
... in advance thanks for your advice