Backing up to a Mac drive

[Thomas]

Zip is probably your best bet, as it's supported on all platforms

ZIP does not preserve the Amiga file attributes. As preserving the file attributes is the main reason for using an archiver, it is no very wise to use ZIP.

Unfortunately when I tried to unarchive the file I got errors

This is probably because you use the buggy LhA 2.2 from Aminet. Try 2.11 instead. http://people.freenet.de/aclogic/lha.html

You should test the archive before you copy it to the network drive and again after you copied it, just to see if it is the network which causes the errors.

Bye,
Thomas