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I wouldn't bother and just download via torrent when needed.
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@PQR Charity shop and torrent.If you really want to rip them then Handbrake and a USB thumbdrive will do the job.
Depending on the TV then you may or may not be able to play h265 encoded videos which, if so, would mean the 50ish DVDs there should just about fit on a 32GB thumbdrive. Call it 64GB to be safe, and then get a 128GB because they're so cheap.
I wouldn't bother and just download via torrent when needed.