Thumbnail preview please! Awful SLOW navigation

It would be really nice if you could use thumbnails instead of browsing one by one your wallpapers. They are indeed of excellent quality but it takes too long too upload!! Plus you have to start over from the first page every time you switch to another category , its annoying.
Also, please don’t use png. Convert your files to jpegs only. Your png files are huge pictures like 4 to 7mb !!! That’s too much for a wallpaper picture.

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