[Gen9, Gen10 General] Falk5T:
I took an old credit card and wrapped the center in tape so it wont bent that easy. I left the edges free of course.

With that Card it was fairly easy to open up the first three sides of the Archos. Just stick the corner of the edge between the two parts of the Case. The Positions of the pins are quite an important thing to know when you want to open it quickly.

When you go around the case you should feel stronger resistance at at least 4 points on each side. These are the clips, when you apply some pressure on them they will snap out.

The hardest part would be the last side, which should be that side where the "Archos 80|G9" text is placed. To open that up, don't even try to use the card or even more dangerous, a screwdriver.

You actually just need to carefully open the Tablet up, until the both sides are about 6cm apart. If you look closely, you might see one straight cylindrical Pin on each side, inside. They will slide out of their sockets while opening the tablet up. They might make it hard at the first time, as I remember mine to be glued a little bit.

When you can see these Pins, or have the Tablet opened up for around 6cm or 7cm, you can carefully but with enough strength open the Tablet even further. You might think the clips will break, but they won't. At least mine did open only that way. It will make a cracking sound and literally jump open.

Thats the most critical part. You really HAVE to get out not to rip the connection to the display apart. When the Clips are open, hold everything still for a while and look at the conducting foils etc, you should be able to lay down both half parts of the case very closely to each other.

When you want to extract the Hard drive, you need to unscrew the HDD first. There are two vertical screws and four horizontal ones. You should immediately see the two vertical ones. Unscrew them. After that you should lift the smaller Battery to the side to get to the first two horizontal screws.

Place the Battery back and unscrew the last two screws.

When you finished that you really need to unscrew the bigger battery. Its fixated with two vertical screws. Unscrew them and fold the battery to the side. You should now be able to see some connectors (Display and the SATA connector as well as some soldered wires which lead to the batteries)

That one which leads to the Hard Drive should have tiny dark clips on each side of the flat conductor foil. Carefully pop them out.

After meddling with the copper foil, you should be able to disconnect the entire drive WITH the SATA connector compound.

This method is safer than trying to disconnect the drive alone, as the tiny conducting foil (is that word even right?) will in nearly all cases come off with the Drive, and under the Battery you would not even see it.

I hope you have already tested and formatted the SSD to EXT4, (MiniTool Partition Wizard Home Edition 7.6.1 worked just right).

Unscrew the SSD from its case and put the Archos SATA connector onto the drives SATA port.

Place the drive inside the Archos. You should at best fix the drive with some more or less soft material. On the Sides you might use some foam or rubber, but on the board of the Drive I would not use just something. Don't use black foam based stuff, as it could contain carbon and thus might conduct electricity. I used silicon heat conducting pads. They conduct the heat from the controller to the monitor backplate and the Case of the Archos. I guess its not needed at all, but it does a perfect job holding everything in place and takes care of heat as well. Also it surely does not conduct electricity.

Make sure the drive is pushed in the direction of the Processor, so the tiny connector won't just slide out. When its fixated you should screw the Battery back on and put the other half of the case with the display back on. DO NOT clip them back of course. You might now start the Device to format the Drive internally and refresh the media storage.

After you have done these two steps you should be able to see the full storage in the datamanager. If not also try resetting to factory settings.

Try transferring lots of small files and some big files (best be over 20 Gb to be sure). When that goes fine, try to play some media.

After that download a random memory benchmark tool and let that run over your SSD.

If all these tests do not fail and everything works perfectly, you might close the case entirely. Congrats.