First time poster since I'm a Kobo lover heretical as it may be

however both my Kobo Aura H20 and now my Samsung tablet need to be serviced and I
need something to read on meanwhile . So I want to pick up a cheapo Kindle WiFi 6" Touch just to use a reserve. However, there is no sd card, presumably because it's an old model, so the question is, can I transfer ebooks from the Samsung tablet or the usb stick i have my ebooks on, or do I need a computer? Or is there another solution to geting the books on the reader without using a computer?
Very grateful if someone can help me.