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Abstract-Nowadays providing security for data in a personal computer has become the biggest problem, due to availability of high capability cracking tools in the market. In general people will store their data in hard disks and removable disks. Even if they are password protected they can be easily cracked. So, providing security for hard disks and removable disks has become cumbersome. Existing system uses TrueCrypt technique for encrypting text files data. But, using TrueCrypt is not secure as it may contains so many unfixed security issues like it data may loses and includes garbage after decrypt. So, that we are proposing another new technique Radix-64 with symmetric key encryption for encrypting text files. The Radix64 is also called as Base64, is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation and symmetric key encryption is a technique for encrypting data by using a single key.