Right-click an SSH session in the Session Manager and choose SFTP Browser…, or choose Transfer → SFTP Browser… while an SSH tab is active. The browser logs in with the built-in SSH engine; questions such as a new host key, a password or a key passphrase appear in the window, with an Answer box.

The window has two panes: This computer on the left and the server on the right. The left pane starts in the session's download folder.

• Double-click a folder to open it; Up goes to the parent folder; type a path and press Go to jump to it. Home (left side) goes to your home folder.
• Click to select, Ctrl+click to select several, Shift+click to select a range.
• Upload » copies the selected files and folders on the left to the server folder on the right. « Download copies the selected server files and folders to the folder on the left. Double-clicking a file copies it to the other side. You can also drop files on the window to upload them.
• New Folder…, Rename… and Delete… work on either side. Delete asks first and deletes folders with everything in them; on this computer it is permanent (no recycle bin).
• Permissions… (server side): tick read, write and run for the owner, the group and others, then Apply. The number (for example 0644) shows the same setting. It changes the selected items only, not what is inside a folder.
• A progress bar shows the current file; Cancel stops the transfer.

A file being copied is saved as name.part until it is complete: on this computer for downloads, on the server for uploads. If a transfer is cancelled or the connection drops, the .part file stays. Send the same file again to the same folder and Saltbush continues from where it stopped; the status line says how many files were resumed.

Saltbush only continues when the .part file is not longer than the original and was written after the original last changed. Otherwise it starts again from the beginning. To force a fresh start, delete the .part file.

Copied files keep their modification time. Uploads from Linux also keep the file's permissions (a runnable script stays runnable).

Several browser windows can be open at once. The browser cannot open sessions that need the OpenSSH client (a jump host or extra -o options); use Transfer → Open SFTP Tab… for those.

Tools → SSH Agent… shows the agent your sessions use and the keys it holds.

• Add a key file: choose the private key, type its passphrase, and optionally a time to keep it (in minutes) or “ask before each use”.
• Smartcard or token (PKCS#11): choose the card's PKCS#11 library (for example OpenSC's opensc-pkcs11.so or a YubiKey's libykcs11.so; libraries found on the computer are listed under Found), type the PIN and press Add Smartcard Keys.
• Remove one key, or Remove All Keys.
• Lock hides the agent's keys until Unlock is pressed with the same password.
• Start an Agent (Linux): if no agent is running, Saltbush starts one for its sessions, local shells and scripts, and stops it when Saltbush exits.

Passphrases, PINs and lock passwords are handed to ssh-add privately, never on a command line. On Windows, start the “OpenSSH Authentication Agent” service first.