Use Google Drive for your own scanned notes, backup, and collaboration with friends. For textbooks, buy second-hand, use NPTEL, or download official NCERT PDFs. Your hard drive should be clean, but your concepts should be crystal clear.
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Great for building a base with varied problem sets. A. Das Gupta: Favored for higher-level practice sessions. Top Google Drive Repositories for JEE Material IIT JEE Books PDF Google Drive: A Comprehensive