Resizing Attachment Image on Action Text

Question

I'm trying to resize on disk an attached image after saving it using Action Text.

I found this:

Rails6 resize uploaded images with Action Text & Active Storage

that only shows the resized image, but it's same size on disk.

After much searching on the Internet, I did this:

Get Path of blob file:

image_file_path = ActiveStorage::Blob.service.send(:path_for, blob.key)

Create an image object from that path of file:

image = MiniMagick::Image.read(File.binread(image_file_path))

Apply changes on image:

ImageProcessing::MiniMagick.source(image)
  .resize_to_fit(width, height)
  .call(destination: image_file_path)

Now, the attached image is resized, but metadata is wrong, so an integrity error is shown when it try to show the image.

The real new data is:

Any suggest?

Thanks!