A lot of student struggle more with Data Sufficiency than with Problem Solving. This is often because they don't have a solid DS strategy - they're still trying to solve them in the same way they solve PS.

Here are some helpful articles to help you reframe your thinking and your approach to DS questions:

How DS Works: https://www.manhattanprep.com/gmat/blog/ ... ncy-works/

Rephrasing DS to Answer the RIGHT Question: https://www.manhattanprep.com/gmat/blog ... questions/

Common DS Traps: https://www.manhattanprep.com/gmat/blog ... ncy-traps/

Why am I better at PS than DS? https://www.manhattanprep.com/gmat/blog ... fficiency/

Test Cases: https://www.manhattanprep.com/gmat/blog ... est-cases/

Avoiding the C-Trap: https://www.manhattanprep.com/gmat/blog ... fficiency/

Why Geometry DS is Harder: https://www.manhattanprep.com/gmat/blog ... ncy-wrong/

Draw It Out: https://www.manhattanprep.com/gmat/blog ... aw-it-out/

Giveaway DS Statements: https://www.manhattanprep.com/gmat/blog ... tatements/

The Importance of Getting "No": https://www.manhattanprep.com/gmat/blog ... at-part-1/

Here's Why You're Missing DS Problems: https://www.manhattanprep.com/gmat/blog ... ms-part-1/

Avoiding Calculations on DS: https://www.manhattanprep.com/gmat/blog ... fficiency/

Yes/No DS Questions: https://www.manhattanprep.com/gmat/blog ... questions/

Follow Your Process: https://www.manhattanprep.com/gmat/blog ... ss-part-1/

The Goldilocks Method: https://www.manhattanprep.com/gmat/blog ... ust-right/