Try Nextcloud

Once you click the following button you will be redirected to a newly created Nextcloud instance only for you.
It will only be alive for 15 minutes and after that it will go into void. Meanwhile you can do anything you want with it, have fun!

The default username and password are:
Username: admin
Password: admin

Setting up an instance takes about 30 seconds, please be patient.

Status: Not running . . . . .