The BEST File Manager for Windows

Works with and greatly enhances:

Windows 11, 10

Windows 8, 7, Vista, XP

Servers 2003 and later

Starting at just $50 for home use and $69 for a business license (and a business two-pack for just $99!)

What's New / What's Up

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Version 4: the future

Major new tools, significant upgrades to current components and faster folder listings.

  • Find and rename problem files: bad paths, illegal characters, Linux & iOS (Mac) characters.
  • Check files and folders for compliance with different file systems e.g., NTFS, Fat-16, Fat-32, eFat, CDs, iOS, Linux and custom.
    Know if the files are right before you copy.
  • Delete files no matter their length or how they are named.
  • Powerful renaming with RegEx e.g. change 'Romeo Smith' into 'Smith, Romeo' and much more.
  • Lightening fast directory listing no matter how large the folder.
  • Detailed reports for copy errors.
  • Variable text size for views and dialogs.
  • and many more improvements and fixes..


See the V4 preview here.

Update May 2017

A May 2017 Microsft security update for Windows 10 conflicted with a major routine in FileBoss resulting in FileBoss not starting on some Windows 10 systems.

Versions V3.101 and later, fix the problem. You can read more about this at the page
Windows Creators Conflict.


Finding Files by Size

To Find Files by Size

Menu item for Find Files by SizeSpecify what you want to find

  • Select Find > Files by Size... or (Alt+I,Z) from the main menu to open the dialog where you can specify exactly which files you want to find.
  • If one or more folders are selected they will be automatically entered into the Paths filed of the dialog when it opens
  • FileBoss remembers what has been searched in the past even when it has been closed and then started again so you can always select a previous entry using the drop down list.

Click on image for full size view

  • Select the drives or paths you want to check. Multiple paths are separated with the semi-colon (;), comma (,) or bar character (|). You can even specify folders to exclude by preceding the name with a minus sign. For complete details right-click the field in the program.
  • Then enter the smallest and largest size for which you are looking. The sizes are in bytes but following the number by a K or an M indicates kilobytes and megabytes respectively. Enter Zillions or -1 for unlimited size.
  • Click OK to search and create a Virtual Folder of all matching files

Hint: You can limit your search (and thus speed it up and make its results more meaningful) by specifying one or more folders to search instead of just a whole drive and, in the above example, folders to be excluded.

Entering multiple paths and patterns


Both the paths and file patterns fields can accept either simple entries, e.g.

C\Data\My Data and *.bmp or very complex strings that specify not only what to include but also what to exclude from a, most typically, search.

For instance both can specify multiple objects such as

C\Data\My Data ; D:\Backup\MyData


*.bmp ; *.gif ; *.png ; *.jpeg ; *.jpg 

For a complete description of these fields either right-click the mouse over the fields for context help from within FileBoss or see Advanced Paths & Patterns.


Displaying the File Sizes in the Contents Window

(If the file sizes are not already displayed in the Contents Window)

  • This works the same in both Explore Views and Virtual File Sets.
  • Move the mouse over the column headers (the column headers are at the top of the Contents Window and have titles like Filename, Ext and Size.)
  • Right-click the to display a list of columns that can be displayed
  • Check the boxes next to items you want displayed.
  • Click the Close Menu button.

Hint: You can change the order of the columns by clicking a header with the left mouse button and, while holding the mouse button down, dragging the column to its new location.

Sorting by File Size

Click on the Size column header. To reverse the sort click the column header again.