Many cloud storage services. Sometimes there are so many that it is difficult to choose a good service. Some of the most popular ones are Dropbox, Microsoft's OneDrive, Google's GDrive, Apple's iCloud, Mega, and a long etc. But these services are proprietary, paid, and worst of all, their servers are hosted outside of Europe, mostly in the US or China, which poses a risk to customer data and privacy.
Here you can find some alternatives that are somewhat friendlier to European users, some of them free, open source and with data centers within Europe, to protect data with the GDPR.
Best cloud storage services
The list with some of the services of most interesting cloud storage If you are concerned about your data, it is:
ownCloud
ownCloud It is one of the best open source cloud storage services. It already has more than 50 million users around the world, and it can be a fantastic solution to trust your data. It has clients for Windows, Linux, macOS, iOS and Android. And it not only has plans to store it on its servers, it also provides you with the software to create your own private cloud.
Nextcloud
Nextcloud It has many similarities with the previous one, it is also open source, it is based in Europe, and it is a Linux-based cloud solution. As with the previous service, it is also more than a simple storage service, since it allows collaboration between work groups, synchronize and share files, use calendar, contacts, etc. Of course, it is GDPR compliant and has cool security features.
pCloud
pCloud is a cloud storage service with servers in European territory, based in Switzerland, although it also allows its users to choose data centers in the United States. Although it is not open source or free, it is very efficient and secure, with AES-256 encryption capacity and backups of your data with up to 5 backup copies stored on 3 servers located in different areas.
Troubled
Troubled is another highly recommended cloud storage service based in the EU. It is not the cheapest, but it provides great service and a high level of security. Users will be protected under the protection laws of the Netherlands and Ireland. On the other hand, if you don't have great knowledge, it can be a great service, since it is very easy to use.
CloudMe
CloudMe is next on the list, another recommended cloud storage service. Based in Europe, specifically in Switzerland, it was founded by Xcerion, and initially called iCloud (until Apple bought the domain). It has both paid and free plans limited in time. The downside is that it doesn't offer encryption, and it doesn't have chat support, just FAQ.
Jottacloud
Jottacloud is the last of the services on this list. It's neither open-source, nor free, but it does offer cheap, privacy-oriented cloud storage plans, and it's very easy to use. It is based in Norway, one of the countries with the best privacy protection laws. The free plan is 5GB, while you can get unlimited service for just a few euros.
For everything else there is Mastercard - I say Telegram. Their servers are not open source either, but it is free and without a space limit and if in the future they limit storage and put it for a fee, I would gladly pay.