When I try to access files on my external hard drive on one macbook, it says I have insufficient access privileges. I use the external hard drive on my other macbook and it works fine. How can I fix this problem?

Question

I've tried looking the answer up on google, but I've come up empty handed. Do I need to change permissions somewhere? I've tried setting everyone to have read and write acess on both machines and that didn't work either.
My macbook that works perfectly with the hard drive is running snow leopard. the other macbook is running leopard. i'm not 100% certain what brand my external is but it says firewire800/usb2.0 on it.
i appreciate any help i can get!

Answer 1

06-sep-2012 0:14 
Me compre un ipod classic de 160gb cada vez que trato de ponerle musica de mi disco duro externo solo copia hasta 1500 canciones y luego me congela el Itune  y no lo puedo cerrar, me pide que restaure el ipod como de fabrica, lo hago y nada.  Trato de cerrar el programa de itune y no me deja, trato de apagar el computador y no lo puedo apagar,  he buscado para ver si tiene errores  el disco del Ipod y me dice que esta bien.  Lo he restaurado como 8 veces y le he puesto musica y videos pero siempre me borra todo.  He aplastado Menu y Seleccion para entrar al sistemade diagnostic o del ipod y le pongo el test manual donde entro al IO y me dice q todo esta bien.  Le he dado ya varios Format directamente desde el Windows 7 y nada tampoco, siempre me borra todo desde que pasan mas de 1300 canciones y me congeal todo el equipo.  Ya no se que pensar de esta compania Apple porque no da ninguna solucion ha este tema.
I bought a 160gb iPod classic every time I try to put music on my external hard drive only copy up to 1500 songs and then freezes Itune me and I can not close, asks me to restore the ipod as factory, and do nothing . I try to close the program and itune will not let me, I try to turn off the computer and I can not shut, I looked to see if the iPod disk errors and says it's okay. I restored it about 8 times and I've put music and videos but I always delete everything. I crushed and Selection Menu to enter diagnostic sistemade or ipod and I put the manual test where I enter the IO and q tells me everything is fine. I have already given several Format directly from the Windows 7 and anything either, I always delete everything from passing over 1300 songs and I congeal whole team. No longer have to think of this company because Apple gives no solution has this issue.
iPod classic, Windows 7, ME BORRA TODO Y SE CONGELA