An Alternate Way of Using Nextcloud
Setting up a Raspberry Pi 4 with 2gb of memory to work as a Nextcloud server is quite easy. Download the right ISO from nextcloudpi.com, flash it, put the card into your pi device and after two or three more steps you have a local machine running Pi but you still need to setup port forwarding, open a UPnP port to access the server externally and other steps.
The simpler solution is to download the Nextcloud app on your phone, as well as for the desktop/laptop that you’re using.