is it necessary to insert a game disk every time we play that disk game on ps4

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Yes, the disk is always necessary. If you didn't have to have the disk in the drive you could potentially sell the disk yet still be able to play the game (or alternatively: rent it, install it, and keep it forever). As you can imagine, the publisher of the game would not like that...

Damn_Rookie

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Yes, the disk is always necessary. If you didn't have to have the disk in the drive you could potentially sell the disk yet still be able to play the game (or alternatively: rent it, install it, and keep it forever). As you can imagine, the publisher of the game would not like that...
 
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