It is recommended to do this through an online image sharing platform.
1. Upload your image at a sharing platform (Imgur, Discord, etc.)
2. Copy the direct link.
Make sure that the link ends in ".png, .jpg, .gif, .bmp" or any other image file extension.3. Click the image icon in the text editor.
4. Paste your link.
Screenshots posted on Discord can also be shared this way.
If you want to upload directly to MechSpecs, that's possible too, though the file size is limited to save server space!
NOTE: Imgur's Gallery function is NOT supported by MechSpecs. Use the 'Direct Link' as described in Step 2.