Written 28 Aug 2026. This is a how-to, not a product card. Buy links are not tagged yet.

Copy a file to the leftover box from your laptop

After SSH works, use scp to move one file without a USB stick. A short leftover name makes the typing shorter. You do not need a NAS for this.

SSH from the couch lets you type commands on the leftover box. Sometimes you just want one file over there: a config, a photo, a small script. scp is secure copy. It rides the same SSH login you already have. The leftover box does not need Samba, a shared folder, or a USB stick for this one job.

Skip until SSH already works

SSH from the couch should already get you a leftover-box prompt. A short name is nicer: give the leftover box a short name on your laptop. Key login is nicer than typing the leftover-box password every time: log in with a key. If the key has a passphrase and you are tired of typing it, unlock your leftover-box key once per laptop session. Skip this whole note if you only need a house share other computers browse. That is a folder the house can open.

What this is

scp copies a file over SSH. Same user, same address, same key or password as a normal login. You run it on the laptop. The leftover box receives the file in a folder you name. Pulling a file back the other way is the same idea with the paths swapped. This is not the weekly USB backup. That is a backup of the leftover-box folder.

Copy one file to the leftover box

On the laptop, in the folder that already has the file (Windows Terminal, PowerShell, Mac Terminal, or Linux):

scp ./photo.jpg leftover:~/

That puts photo.jpg in your home folder on the leftover box. Swap the filename for yours. If you have no short name yet, use the long form from SSH from the couch:

scp ./photo.jpg you@that-address:~/

It may ask for the leftover-box password, or the key passphrase, the same way SSH does. When it finishes without an error, the file is there.

Check it landed

Still on the laptop:

ssh leftover ls ~

Or the long form:

ssh you@that-address ls ~

You want your filename in the list. Optional look at size and date:

ssh leftover ls -lh ~/photo.jpg

Copy one file back to the laptop

Paths swap. The leftover-box side comes first:

scp leftover:~/notes.txt ./

Or:

scp you@that-address:~/notes.txt ./

That drops notes.txt in the folder you are sitting in on the laptop. Useful when you edited something on the leftover box and want a local copy.

Optional: a whole folder

Add -r for a folder and everything inside it:

scp -r ./scripts leftover:~/

Keep folders small. A movie library or a photo dump belongs on a house share or a backup disk, not a one-shot scp of gigabytes. For a house folder other computers open, see a folder the house can open. For a checked USB copy, see a backup of the leftover-box folder.

What next

If the key passphrase keeps asking on every copy, unlock your leftover-box key once per laptop session. Need to change a leftover-box file in place instead of copying it? Edit a leftover-box file from the couch. When key login is boring on every computer you use, turn off leftover-box password login once the key works. Keep SSH on the house network: keep the leftover box on the house network. Do not forward port 22.

Skip

• Skip if SSH still fails. Finish SSH from the couch first.
• Skip buying a NAS to move one config file.
• Skip a USB stick for a single small file when SSH already works.
• Skip opening SSH to the internet so a friend can scp in. That is keep the leftover box on the house network.
• Skip turning this into your whole backup plan. Use a backup of the leftover-box folder for that.