Definition of keychain drive in English:

keychain drive

Syllabification: key·chain drive
Pronunciation: /ˈkēˌCHān ˌdrīv
 
/

noun

Computing
Another term for USB flash drive.
More example sentences
  • On the plane, I popped the first keychain drive into the USB Port.
  • Administrators will be able to store configuration settings on a hard disk, directory server, keychain drive or iPod, and then use those settings to set up a number of servers.
  • I now carry 512 MB on my USB keychain drive, which cost 50 bucks.

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