Answer Description
FAT32 is an older format that is supported on most systems, and is the best option provided. NTFS may cause issues between systems and OSs. HFS+ is the native OSX format and is not natively supported by some OSs (to include Windows). AES-128 is an encryption standard.
Wikipedia
File Allocation Table (FAT) is a computer file system architecture and a family of industry-standard file systems utilizing it The FAT file system is a continuing standard which borrows source code from the original, legacy file system and proves to be simple and robust It offers useful performance even in lightweight implementations, but cannot deliver the same performance, reliability and scalability as some modern file systems It is, however, supported for compatibility reasons by nearly all currently developed operating systems for personal computers and many mobile devices and embedded systems, and thus is a well-suited format for data exchange between computers and devices of almost any type and age from 1981 up to the present
File_Allocation_Table - Wikipedia, the free encyclopedia