Floppy disc saves into memory when initialised (4)
I believe the answer is:
limp
'floppy' is the definition.
(thesaurus)
'disc saves into memory when initialised' is the wordplay.
'disc' becomes 'lp' (long play record).
'saves' indicates putting letters inside.
'when initialised' indicates taking the first letters (turn the words into initials).
The initial letters of 'into memory' is 'im'.
'lp' going around 'im' is 'LIMP'.
(Other definitions for limp that I've seen before include "loose" , "exhausted" , "Walk with an uneven step" , "Not stiff or firm" , "Slack, wilted" .)