Linux Bash Script - List file directories on hard drive

i know that if i do the below line it will properly pull the file directory into that file, however it is pulling it for my hard drive and not my external drive.

ls > filename.txt

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I'm guessing you mean contents of file directory.

So something like this...

for file in $dir/* ; do echo $file ; done

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Maybe mention what "future use" might mean.

In a file, like Jorge suggested or to use later in a script as I suggested.

Give an exact description of what you'll use these for.

Also... occurs to me... you might be doing this because you have many files in a directory. Mention file count, if the count is large.

THe following will recurse through all directories on a disk. And show all files including hidden files.
ls -laR  /mountpoint >/archive/directory/TheDiskName.list

another one might be:

find /mountpoint -ls >/archive/directory/TheDiskName.list

You can also use PERL for this. The code will be far simpler + easier to read...

my $dir = "path-to-your-directory";
my @files = glob("$dir/*");

foreach my $file (@files) {
   # do something here with $file
}

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i was able to use

 ls -LR /Volumes/Drive/> textfile.txt

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Thank you everyone!