This video helped me and it really works on all automobiles… (helped me stream recordsdata quicker)
From 18mb .ytd file to 5mb
Video :

1. Open up OpenIV in edit mode
2. Discover the car.ytd file (ex. ageraone.ytd)
3. Then Double-click it and export all textures as .png
4. Go to the place you extracted the .ytd recordsdata
5. Kind by measurement then choose all of the excessive file sizes (Don't choose purple photos..)
6. Open up Photoshop or getpaint.internet then drag and drop the chosen recordsdata
7. Click on picture then Picture Measurement
8. Change the pixel dropdown to %
9. Then change the worth to 50
10. Export as png and overwrite the unique file.
11. Go to the place you edited the recordsdata.. 
12. Then choose all and drag and drop it to the unique.ytd file
13. Then hit okay

Word : Be sure to are on edit mode edit > edit mode

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