If you want to "own" a digital copy to keep on your device permanently, you can purchase individual episodes or full seasons from:
For the most reliable "download" (physical ownership), you can find remastered Blu-ray sets on sites like Amazon. These often include high-quality English dubs and original Japanese audio. Download Digimon Episodes and Movies
: Offers various seasons and the newer films for purchase and download. If you want to "own" a digital copy
: Often carries various seasons of Digimon (such as the 2020 reboot). If you have a Hulu (No Ads) plan , you can download select titles to supported mobile devices. Download Digimon Episodes and Movies