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One space-saving AIT-4 cartridge holds up to 200GB native, 520GB compressed, and offers a fast data transfer rate of 24MB/s (native). Sony's drive technology and AME tape technology come together in the AIT format to deliver a remarkable combination of high reliability and high recording density. Since Sony introduced the format in 1996, AIT has gained a reputation for high reliability and high capacity in a space-saving form factor. In the AIT format Sony has applied advanced technologies refined and proven over many years. Thanks to Sony's technological expertise, AIT achieves extraordinary data densities in a small 8mm cartridge. It's a space-saving solution that's much more compact than other formats of equivalent capacity. Building on AIT's established technology, Sony raises data density even further in AIT-4 to achieve compressed capacity of 520GB. AIT-4 media's smooth surface improves electromagnetic conversion characteristics, while a newly developed lubricant reduces friction. An enhanced protective coating minimizes wear on heads and the tape itself. WORM (write-once read-many) allows data to be written and added but not overwritten or erased. This protects valuable data against accidental erasure and prevents alteration of archived data files. Sony SDX4-200C features non-contact R-MIC (Remote Memory In Cassette) chip technology. This internal memory can simplify media management and accelerate access in library environments, compared to conventional bar-code methods.