BitLocker is better or I should try something else ?WARNING: Using TrueCrypt is not secure http://krebsonsecurity.com/2014/05/true-goodbye-using-truecrypt-is-not-secure/ http://truecrypt.sourceforge.net/
Assuming that the platform is Windows since you mentioned BitLocker, try DiskCryptor [1]
[1] https://diskcryptor.net/wiki/Main_Page
