Driving demands and development for new portable storage devices are based on the need for more storage space to accomodate the grow on today's "e-lifestyle." (Sharing digital music, images, video and information files or backing up large HD storagecapcity)
... The CD with its current storage capacity ... forget it!
Moreover, there are many portable products in the market today that can meet user's high storage capacity requirements and sharing purposes .
To name few ...
CompactStor by RITEK Group ... Storage capacity up to 1.1GB,
http://www.ritek.com.tw/ritek_e/new/2001/0522.htm
Peerless by Iomega ... Storage Capacity up to 20 GB
http://computers.cnet.com/hardware/0-1092-8-6278787-1.html
USB 2.0 HDD by Anypak ... Storage Capacity up to 60 GB
http://www.anypakusa.com/products.htm
Trek 2000 and JM Tek each demonstrated tiny (about the size of a disposable lighter) solid-state "drives" in capacities ranging from 8MB all the way up to 1GB.
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Who knows what the future technology will make available/introduce in this regards ... Johnny Mnemonic (the movie), for instance, ... gave the idea of loading electronics data straight into the brain ...
....
... no wonder this movie proved to be a critical and commercial failure.