USB Flash Cards, Flash Memory Sticks, Pocket Discs, Flash-Key, Pen Discs.
These are the memory sticks that plug into your devices USB port, are carried in pockets or on key rings.
They are available with covers that slide, twist, revolve or remove in huge variety of shapes and colours. (See samples)
Sizes are available from 512K (Rare now), 1GB (Best Value) to 32GB and soon 64GB.
Flash Memory Cards are also available in different speeds for different applications. For most applications the only advantage of faster media is faster writing or loading, which is the duplicator's problem.
Printed and loaded USB Flash sticks are probably one of the most effective promotional products available.
USB memory sticks are claimed to be extremely time durable, most with guarantees of 3 -10 years of data retention.
SD are the most popular of the small cards. They are used in computers, phones, cameras, PDA's, video cameras, GPS, games and more. They are available in sizes of 1GB, with 2GB, 4GB, 8GB and 16GB. Loading speed varies from 80x to 150x. But this is not material except for special high capacity needs. For computers, PDA, and GPS applications standard speed will usually be sufficient.
These are the very small Flash cards, popular in phones, which need to be inserted into an adaptor the size of the SD card for duplicating, making them expensive to duplicate.
These are probably the second most popular Flash cards. They are a square shape. Their sizes range from 1GB to 32GB.
These are used in Sony devices.
"...The NSW Electoral Commission purchased about 2,500 Palm EZ PDAs, and internally wrote software to manage the 4,300,000 voter's names. 2,500 512Mb and 1GB SD memory sticks were then duplicated by CD-ROM Services Pty Ltd in Sydney in 3 days. Within a week of the roll being finalised, the PDAs were in the hands of the electoral officers..." More...