Importing Animations from Mixamo

https://www.mixamo.com/#/?page=1&type=Character

Mixamo Allows you to download or import your own characters and give them animations that you can download. For instance you can upload a 3D model, and use the auto rigger to choose the location of the bones and give your characters animation without having to animate.

Downloading a Character

1. Go to mixamo main page and select a character to download, do not select or add any animations,when you select animations it will store them in the fbx file and I don't know how to remove selected animations other than refreshing the page.
2. Select the model you want to download
3. Click on the Download button on the upper right hand side
4. Make sure the format is FBX and the pose is set to T-Pose, then click download

Here is a picture demonstrating the steps

Importing into Unreal

Drag the FBX file you just downloaded into the content window, you will see

The Default options are fine, if they aren't matching the picture, you can select reset to default,
this picture was taken in Unreal engine 5.2 , therefore make sure Skeletal Mesh is checked and Import Mesh is checked

Note: Typically when importing from other FBX's such as market place, you would specify a skeleton, in this case you don't
Mixamo will automatically import the skeleton file and the Textures and Meshes(The 3D Character)
After you import the files you will see a bunch of textures ,materials, and Physical Asset(used for limb hit detections) , your character skeleton and the skeletal mesh.

Rigging your Character

Mixamo doesn't come with a IK_Rig or a control rig, you have to add those separately as on 02/2025
See Creating a control rig or Creating a IK_Rig