I am an extensive user of Google, not only for its search engine but also for many of its apps such as Google Photos, Google Mail, Google Calendar etc. Trusting our data to the internet (or "the cloud" if you prefer) always carries some risk. If it is a smaller internet storage or service provider that you use there is always the risk that it might go out of business. With Google this is not likely to be a problem. However, many are concerned about how secure and private their data is whilst being hosted (kept) on Google's big computers (servers). The risks to the individual are actually overplayed but there remains the potential for unlawful access to data.
Following UK's decision to leave the EU, Google have announced that data of their UK users, which used to be stored on servers in the Republic of Ireland, will now be held in the US. What is the impact of this? Well, while in Europe, we have been "protected" by the EU GDPR (General Data Protection Regulations). This will no longer apply in the US although Google have stated that they will "abide by the general provisions of GDPR". To be honest, the GDPR does little to protect you against web sites and companies that misuse or mishandle your data. It provides for legal redress against such companies but this is like shutting the door after the horse has bolted.
Should you be worried? I think not. Provided you do all the sensible things to protect your data, careful use of strong passwords and so on, the risk to individuals is minimal. I shall continue to use Google's services.