No, you can’t. You cannot add more than one file in one NFT under the public or private category. If you need to do so, you need to upload multiple files and duplicate the same wallet address on a list when minting as shown below. This will create multiple unique NFTs with different token IDs and all are assigned to the same wallet.
0x8d0CE07483596c76e0C8bB17Eb32e7dA7e3d270c
0x8d0CE07483596c76e0C8bB17Eb32e7dA7e3d270c
0x8d0CE07483596c76e0C8bB17Eb32e7dA7e3d270c
0x8d0CE07483596c76e0C8bB17Eb32e7dA7e3d270c
0x8d0CE07483596c76e0C8bB17Eb32e7dA7e3d270c
