Hi, I'm new here but have had a Note 9 for quite a while now. I recently discovered this little gizmo, which allows me to connect a USB-A drive to the type C connector on the phone (I had previously only thought this could be used for charging).

Samsung EE-UN930BBEGWW Adaptor Black - https://www.amazon.co.uk/dp/B01N7PKBAN?psc=1&ref=ppx_yo2ov_dt_b_product_details

I like to watch movies etc. when travelling and can now download to numerous USB-A drives and simply plug in to the phone when I fancy. However, I was wondering if I may be doing long term damage to the phone. Obviously, I can't charge the phone while watching but is there any other downside? Battery damage, or overloading the phones memory. I love my Note 9 and don't want to trash it.

Thanks
Steven_Ford