You can use the All Files Browser to search for media files by name, as well as view or clear recent search terms, or add search criteria that allows for a more advanced file search.
The All Files Browser is available when Enable Complete Features is selected in Logic Pro > Settings > Advanced.
In Logic Pro, click the Browsers button 
in the control bar, then click All Files.
Enter a search term in the search field, then press Return.
Speed up your search by restricting it to a particular folder or volume.
To change the visible contents: Click the Computer button 
, Home button 
, or Project button 
.
The Computer button shows the contents of the local hard disk, optical drive, or other storage media connected to your computer. The Home button shows the contents of your home directory. The Project button shows the contents of the current project folder.
To move through the folder hierarchy: Click the folders in the file path hierarchy, or use the Back button 
or Forward button 
.
To sort the search results, click any of the column headers.
Click the small “x” at the right side of the search field to clear the search term.
In Logic Pro, do one of the following:
To view a recent search term: Click the magnifying glass icon at the left side of the search field, then choose a search term from the pop-up menu to display the results.
To clear a search term: Click the small “x” at the right side of the search field.
To clear all search terms: Click the magnifying glass icon at the left side of the search field, then choose Clear Search History from the pop-up menu.
In Logic Pro, do one of the following:
To add a search condition: Click the Add button (+) to the right of the search field. You can add additional search conditions (up to ten) by clicking the Add button (+) to the right of an existing condition row.
To remove a search condition: Click the Delete button (–) to the right of the condition row.
To hide search conditions: Click the Delete button (–) to the right of the search field.
All condition rows are hidden. You can restore them by clicking the Add button (+) to the right of the search field.