The phrase "accessible and useful" is correct and usable in written English.
You can use it to describe something that is easy to reach or obtain and also provides value or benefit.
Example: "The new website is designed to be both accessible and useful for all users, regardless of their technical skills."
Alternatives: "easy to access and beneficial" or "reachable and practical".
The move to include your Google+ library in Drive likely helps make it much more accessible and useful for those who are already using Google+ as a backup destination for pics snapped on their mobile device.
Bentham held, with Hobbes, that unless the language of the law and the methods used to interpret it were accessible and useful to the ordinary citizens to whom it applied, law would remain ineffectual as a guide to their behaviour.
"Google is looking for highly intelligent, enthusiastic Technical Leads/Managers (TLMs) to build Google's Television Technology team in London to help us make the world's information universally accessible and useful through TV.
The UNMC bioinformatics data manager and curator are now responsible for obtaining experimental datasets from each study that has used NNTC tissue samples, and transforming these into an accessible and useful format.
Google's mission statement is to "organise the world's information and make it universally accessible and useful".
Google has been "organiz[ing] the world's information and mak[ing] it universally accessible and useful".
The company's mission is "to organize the world's information and make it universally accessible and useful".
It makes data that is publicly available but unusable accessible and useful.
Google wants to "organise the world's information and make it universally accessible and useful".
The tools are accessible and useful, but I found the extras, like Daria screen savers and icons, disappointing.
But this is the moment to lay down the foundations for a future of high-quality, accessible and useful data.
