Dropbox and Flagging Internet Providers

Hello all, i recently had my Internet provider send me one of those emails because of a torrent and it has me a bit spooked. I have a file that is something like 150 GB of a show I want to download, but it is on Dropbox, so I am wondering if like the torrent it would flag on my Internet Provider? I know about Binding for torrents now and have protonvpn, but because this is about Dropbox, I wasn't sure if it is safe right now to try and download it or if I should look into an alternative method? I imagine that even with protonvpn my provider will go "hmm, what is this large file he's downloading?", or was it specifically because I did a torrent that they saw it and emailed me? For reference they knew the show title, and it is Verison. Thanks for any help on this!