A method for storing different unit loads (95-1, 95-2, 95-3) in at least one storage rack (1; 98) having adjacently disposed storage spaces (96-1, 96-2) in storage levels lying one above the other, whereby the unit loads (95-1, 95-2, 95-3) are conveyed to the storage spaces (96-1, 96-2) by means of at least one unit load receiving device (7; 97) which can be moved along a guide track (11; 110, 111) in front of the storage rack (1; 98) and from the unit load receiving device (7; 97) into the storage rack (1; 98) onto the storage spaces (96-1, 96-2) by means of a transport device , characterized by the steps - acquiring the density for each unit load (95-1, 95-2, 95-3) by means of a control system (14; 115), - acquiring at least one threshold value for the density of the unit load by means of the control system (14; 115), - comparing the density acquired for each unit load (95-1, 95-2, 95-3) with the at least one threshold value for the density of the unit load (95-1, 95-2, 95-3) by means of the control system (14; 115), - assigning the storage spaces (96-1, 96-2) to a first storage space category and to a second storage space category and acquiring these storage space categories by means of the control system (14; 115), - determining unoccupied storage spaces (96-1) of the first storage space category and determining unoccupied storage spaces (96-2) of the second storage space category by means of the control system (14; 115), - storing first unit loads (95-1) by means of the unit load receiving device (7; 97) and transport device in unoccupied storage spaces (96-2) of the second storage space category if a deviation falling below a threshold value is determined, and - storing second unit loads (95-2) by means of the unit load receiving device (7; 97) and transport device in unoccupied storage spaces (96-1) of the first storage space category if a deviation exceeding a threshold value is determined. - acquiring the density for each unit load (95-1, 95-2, 95-3) by means of a control system (14; 115), - acquiring at least one threshold value for the density of the unit load by means of the control system (14; 115), - comparing the density acquired for each unit load (95-1, 95-2, 95-3) with the at least one threshold value for the density of the unit load (95-1, 95-2, 95-3) by means of the control system (14; 115), - assigning the storage spaces (96-1, 96-2) to a first storage space category and to a second storage space category and acquiring these storage space categories by means of the control system (14; 115), - determining unoccupied storage spaces (96-1) of the first storage space category and determining unoccupied storage spaces (96-2) of the second storage space category by means of the control system (14; 115), - storing first unit loads (95-1) by means of the unit load receiving device (7; 97) and transport device in unoccupied storage spaces (96-2) of the second storage space category if a deviation falling below a threshold value is determined, and - storing second unit loads (95-2) by means of the unit load receiving device (7; 97) and transport device in unoccupied storage spaces (96-1) of the first storage space category if a deviation exceeding a threshold value is determined. <EOS>