For setting up a new TV. After that the TV updates itself — no USB drive needed.
Check this before installing to confirm the file was not corrupted while downloading or copying.
d79c06e746420cb2a46b01e49b02c85c75b0e1300e5c689993573f2be0e9bd74修复视频、PDF 和图片课件打开失败,刷新过期链接及重新上传后的 PDF 缓存。
On the TV, go to Settings → Accounts & Security → Install apps from unknown sources, allow it, then retry.