First of all, if you're here, can afford it and the data is important enough to you, please pursue a professional service. (At least a couple hundred, depending on size)

If the data is important and you simply can't afford it and won't in the future or the data is just not that important, read on.

In a lot of cases you get one chance to make an image, please seriously consider professional services

First, remove the drive from the enclosure, Google model + "disassembly", you want to bypass the enclosures shitty controller. This is almost assuredly why the tools are having issues

Then you'll need a SATA to USB (or a desktop with spare SATA ports) and connect it

Now, you need to focus on making to a byte-to-byte image (NEVER do data recovery work off the physical drive). I typically use a piece of data recovery software called R-Studio (that I totally paid for.....) but Testdisk has imaging functionality https://www.cgsecurity.org/wiki/Image_Creation

However, if you can boot to Linux, read up on and use a tool called 'ddrescue' it's specifically designed to make a drive image by first getting all the good easy stuff first and then going back with different methods over the problematic parts.

If you get a complete image without any read errors, you may have lucked out and the enclosure controller just crapped out

You will need enough space that is at least the label size of the disk you're working with. It's going to be a byte-to-byte image basically an exact mirror of the drive regardless of if there's data in a sector or not, so if the disk is 500GB the resulting image will be 500GB.

Once you have as much of a complete image as you can, then you are safe to work off that image as much as you need (though for extra safety id make a copy of it)