I answered a similar question here a while back. My answer is copied below.

I use cp -Rfv sourcefile destinationfile with success on a pretty regular basis.

cp = copy

R = maintains file hierarchies

f = if an existing destination file cannot be opened, remove it and try again

v = verbose mode, displays files transferred as it progresses

sourcefile = data you want to copy

destinationfile = directory/drive you want to copy to

I answered a similar question here a while back. My answer is copied below.

I use cp -Rfv sourcefile destinationfile with success on a pretty regular basis.

cp = copy

R = maintains file hierarchies

f = if an existing destination file cannot be opened, remove it and try again

v = verbose mode, displays files transferred as it progresses

sourcefile = data you want to copy

destinationfile = directory/drive you want to copy to

I answered a similar question here a while back. My answer is copied below.

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I use cp -Rfv sourcefile destinationfile with success on a pretty regular basis.

cp = copy

R = maintains file hierarchies

f = if an existing destination file cannot be opened, remove it and try again

v = verbose mode, displays files transferred as it progresses

sourcefile = data you want to copy

destinationfile = directory/drive you want to copy to

I answered a similar question here a while back. My answer is copied below.

I use cp -Rfv sourcefile destinationfile with success on a pretty regular basis.

cp = copy

R = maintains file hierarchies

f = if an existing destination file cannot be opened, remove it and try again

v = verbose mode, displays files transferred as it progresses

sourcefile = data you want to copy

destinationfile = directory/drive you want to copy to