Frequently Asked Questions

Application use

This section contains frequently asked questions about how to use Fileside.

How do I navigate back to previously viewed folders?

The undo history includes navigation too, so to navigate back through recently visited folders, just undo the last action a few times. Redo moves forward again.

How can I access an external drive?


External drives show up under /Volumes in Fileside.


Navigate to This PC (This PC icon) in Fileside, and it will show up in the list.

How can I access a network drive?


To view a network drive, e.g. a NAS, it first has to be mounted. Mounting can’t be done from within Fileside (yet). You can do it in Finder by going to the Go > Connect to Server… menu entry. Once mounted, it will show up in Fileside under /Volumes.


There are a couple of different ways of viewing network drives on Windows.

If the drive is mapped to a drive letter, just navigate to This PC (This PC icon) in Fileside, and it will show up in the list. Alternatively, type in the drive letter directly in the path field, like so: S:\.

If the drive does not have a drive letter, you can also access it by typing in a UNC path consisting of its IP address or hostname, followed by a shared folder name, like so: \\\stuff

How can I change which application a certain file type opens with?

This can’t be done from within Fileside (yet).


Open Finder, right-click a file of the type you wish to change, and choose Get Info. Under Open with, select an application and click Change All….


Open File Explorer, right-click a file of the type you wish to change, and choose Open with > Choose another app. Select an application and check the Always use this app box.

How can I edit contents of system directories like C:\Program Files on Windows or /Library on Mac?

Operating systems restrict write access to parts of the file system it thinks the average user shouldn’t meddle with. You can only edit and delete items in here from an administrator account.


To run Fileside as an administrator, you need to first open the Terminal app. Then type:

sudo /Applications/

Note however, that this will run Fileside as the root user, and your normal settings and layouts won’t be applied.

Even when running as an administrator, there are some locations you still can’t edit because they are protected by Apple’s System Integrity Protection. These include /System, /bin, /sbin and /usr.


To run Fileside as an administrator, right-click its icon in the Start Menu, choose More and Run as administrator.

How do I copy my settings to a new computer?

First, make sure Fileside is not running on the new computer, or it might overwrite the settings you copy over to it.


Copy everything under /Users/[your_username]/Library/Application Support/Fileside to the same folder on the new computer. Start Fileside.


Copy everything under C:\Users\[your_username]\AppData\Roaming\Fileside to the same folder on the new computer. Start Fileside.

Mac: Why do I get a permissions error when trying to copy my home directory?

If you run into an error like the below when trying to copy or access certain subfolders of your home directory, it’s likely because Full Disk Access is disabled.

FDA Error

Apple’s Full Disk Access is a privacy mechanism added in MacOS 10.14, which prevents apps from accessing certain subfolders under ~/Library containing data related to personal contacts, calendars, emails, bookmarks etc.

To give Fileside permission to read and copy these folders, go to your Mac’s System Preferences > Security & Privacy > Privacy > Full Disk Access and add Fileside to the list of applications. You will need to restart Fileside thereafter for the setting to take effect.

Windows: Why are trashed files not moved to the Recycle Bin?

Microsoft has not made it easy for developers of third-party apps to support undo after sending files to the Recycle Bin. Since one of Fileside’s design goals is to support undo for everything, it uses a workaround here. When trashing an item, it gets moved to an application-specific folder instead, which defaults to C:\Users\[your_username]\AppData\Roaming\Fileside\stash.

You can change the location of this stash, as well as clear it, from the Settings dialog under Trash directory.


This section contains frequently asked questions about the Fileside license.

Can I use one license on multiple computers?

Yes, the license is valid for all computers that you personally use, also across platforms.

For how long is the license valid?

A license is valid for all updates within the same major version range. Say you buy a license for version 1.2, you will then be eligible for all updates up until but not including version 2.0.

Major version upgrades are however expected to be very infrequent. The current plan is to make Fileside feature complete within the 1.x version series. Version 2 is still a considerable way off, and will likely involve a considerable overhaul and optimisation of the internals and a redesign of some of the key features. A version 3 is not even on the cards.

Last updated: 01 September 2022




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