Use the SAVE command. You can save numerical arrays as DAT files by following this syntax...
DIM SAVARR[1] 'DECLARE AN ARRAY WITH THE SIZE BEING THE NUMBER OF VARIABLES YOU WANT TO SAVE
SAVARR[0]=HIGHSCORE 'PLACE ALL THE VARIABLES YOU WANT TO SAVE IN THE ARRAY
SAVE "DAT:<File Name>",SAVARR 'YOU CAN THEN SAVE THE FILE WITH ANY NAME YOU WANT
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