Bulk Rename & Group is a tool which allows you to easily rename and organize all your files from internal or external storage in a single operation. Batch rename and group your selection of files with a large variety of features.

Please try the FREE version before purchasing the PRO version:
https://play.google.com/store/apps/details?id=com.direstudio.utils.fileorganizerfree

If you are happy with it and you would like the support the developer, you can purchase the ad-free pro version.

Note - This is not a regular file manager.
The purpose of the app is to rename and group multiple files at once, in a single operation, based on user's selection of features.

Rename or group all your files in three simple steps:
1. Select Input Files
Use the in-app file browser to easily select the input files.
2. Select Action type and parameters.
Customize the operation using the provided features and options.
3. Select Output Path, see a preview and start.
Select the output path of the new files and see a preview of the new files before starting the operation.

★ Bulk rename / Batch Rename files with the following available options:

✓ Change Base Name - keep the original base name or set a new one for all the files
✓ Auto Indexing - Add an auto incremented number to each file. This can be customized
by choosing the start index, the separator, the index position (start or end) and zero
padding
✓ Capitalization - lower/ upper case
✓ Extension - keep the original extension, update it or remove it completely

✓ Trim - remove all leading and trailing white spaces
✓ Remove chosen characters from the file name
✓ Remove characters at position - first n characters, last n characters, custom range
(from position x to position y)
✓ Replace characters using the desired patterns

✓ Add Prefix - add specified prefix to all files
✓ Add Suffix - add specified suffix to all files
✓ Add date & time (configurable format) - add the last modified date before or after base name.

★ Bulk group files:

✓ By name - contains, starts with or ends with specified text
✓ By modified date - customize parameters (day, month, year)
✓ By size - all unique sizes or specified size in B, KB or MB
✓ By extension - all unique extensions or specified extensions

★ Customize Output

✓ Choose output folder.
✓ Group or rename copies of the selected files, without altering the original files.
✓ Group or rename the selected files.
✓ See operation summary and confirm selection before starting.
✓ See a preview of the output files before modifying them.

★ Preferences:

✓ Adjustable application theme - auto, light, dark.
✓ Adjustable file browser font size.
✓ Adjustable file browser thumbnail size.

Other features:
★ In-app browser for quick file selection - list view & grid view
★ Sort files and folders by name, modified date or size
★ Create & folders
★ Delete files and folders
★ Local Search - Current folder
★ Global Search - Internal & External Storages
★ Works on any type of file - audio, video, photos, documents etc.
★ Works for internal and external storage.