When building personal cloud storage, one usually thinks of ownCloud, which is a classic self-built cloud storage service. Nextcloud is a so-called "next generation" storage built by the original development team of ownCloud. At first glance, I thought it had a "sounding" tone. It redefined Cloud as soon as it was launched. After actually trying it out, I wholeheartedly agree with Nextcloud: it is an excellent choice for personal cloud storage services.