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url: /flow/guide/getting-started/directories/program-folder.md
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# Program Folder

By default Flow software is installed into c:\program files\flow software\\.

Throughout this guide this folder is referred to as the *Program Folder*. It is the main application folder. If during installation you have selected a different location you should exchange this folder for any references you find to *Program Folder* or *c:\program files\flow software*.

### Sub Folders

Several sub folders exist by default within the *Program Folder*. These are used for special reasons by the Flow application and should not be modified unless noted below.

### Components

The components folder stores all the third party component installers. These are normally executed as part of the installation, however should you need to re-install any third party component you can find the installer here.

### Help

Online help files are stored in this folder

### MSSQL

If you chose to install SQL Server Express along with your Flow installation then the SQL Server application files will reside within this folder. MSSQL also has a data folder where it stores the actual database files. By default this data folder is c:\mssql.1\\

### Transport

This folder contains [FlowTransportWeb](/flow/guide/getting-started/components-of-flow/flowtransportweb). It will be linked to your IIS as a virtual folder. You can move this folder to another location if desired however you will need to update your IIS configuration manually.

### Web

This folder contains [FlowWeb](/flow/guide/getting-started/components-of-flow/flowweb). It will be linked to your IIS as a virtual folder. You can move this folder to another location if desired however you will need to update your IIS configuration manually.