NTFS is a file system for Windows. Mac uses HFS. Windows can't read HFS. Mac can read NTFS but can't write (it can write if you install third party software).
Both systems support read and write FAT16, FAT32, and recent versions of their OS support exFAT (which is what is used in SDXC cards).
Pendrives, thumbdrives, USB drives, SD cards, SDHC cards, CompactFlash cards, and all other flash cards and flash drives out there (except external hard drives or SSD drives) use FAT32 or exFAT.
External hard drives or SSD drives use NTFS or HFS depending on what OS you choose to use it with.
Digital cameras use FAT or exFAT file systems.
Hope it helps.