You are probably not doing anything wrong. It seems to me that the real issue is that the instruction, as written, don't work generically. The point at which you are apparently stuck is the chown command, but all that is intended to accomplish is to make sure that "you" (really the pi user) actually owns the folder to be shared.

If you created the /home/pi/HDD directory while logged in as the pi user, and before mounting the external drive, that's already done, so you can simply skip that step. As already mentioned in the answer you got, the FAT file system doesn't support such permissions, so they can't be applied after the drive is mounted.

If you're going to add this mount to your /etc/fstab file and still want it mounted by the pi user, then you'll need to specify the uid and gid on the line. For example:

/dev/sda2         /home/pi/HDD       ntfs-3g     defaults,user,uid=1000,gid=1000,noatime      0        0

Note that this assumes that the pi user is user 1000. (Check that by issuing the id command when logged in as pi.)

You are probably not doing anything wrong. It seems to me that the real issue is that the instructions, as written, don't work generically. The point at which you are apparently stuck is the chown command, but all that is intended to accomplish is to make sure that "you" (really the pi user) actually owns the folder to be shared.

If you created the /home/pi/HDD directory while logged in as the pi user, and before mounting the external drive, that's already done, so you can simply skip that step. As already mentioned in the answer you got, the FAT file system doesn't support such permissions, so they can't be applied after the drive is mounted.

If you're going to add this mount to your /etc/fstab file and still want it mounted by the pi user, then you'll need to specify the uid and gid on the line. For example:

/dev/sda2         /home/pi/HDD       ntfs-3g     defaults,user,uid=1000,gid=1000,noatime      0        0

Note that this assumes that the pi user is user 1000. (Check that by issuing the id command when logged in as pi.)

You are probably not doing anything wrong. It seems to me that the real issue is that the instruction, as written, don't work generically. The point at which you are apparently stuck is the chown command, but all that is intended to accomplish is to make sure that "you" (really the pi user) actually owns the folder to be shared.

If you created the /home/pi/HDD directory while logged in as the pi user, and before mounting the external drive, that's already done, so you can simply skip that step. As already mentioned in the answer you got, the FAT file system doesn't support such permissions, so they can't be applied after the drive is mounted.

You are probably not doing anything wrong. It seems to me that the real issue is that the instruction, as written, don't work generically. The point at which you are apparently stuck is the chown command, but all that is intended to accomplish is to make sure that "you" (really the pi user) actually owns the folder to be shared.

If you created the /home/pi/HDD directory while logged in as the pi user, and before mounting the external drive, that's already done, so you can simply skip that step. As already mentioned in the answer you got, the FAT file system doesn't support such permissions, so they can't be applied after the drive is mounted.

If you're going to add this mount to your /etc/fstab file and still want it mounted by the pi user, then you'll need to specify the uid and gid on the line. For example:

/dev/sda2         /home/pi/HDD       ntfs-3g     defaults,user,uid=1000,gid=1000,noatime      0        0

Note that this assumes that the pi user is user 1000. (Check that by issuing the id command when logged in as pi.)