Deleting numbers from a song title

[TagCenturio]

Many titles within my song collections contain numbers like
01 A hard days night.mp3 and
02 Yesterday.mp3
How can I delete all numbers as 01 or 02 or 08 etc.?

[ohrenkino]

What do your tags look like?
What about creating the filename from the tag data with Convert>Tag-Filename
Format string: %title%

If your tags have no data, then it is advisable to fill them first and import the available data from the filename with Convert>Filename-Tag
Format string: %track% %title%

[TagCenturio]

They look like described above:
All titles have a number in front of the title like:
01 A hard days night.mp3 or

08 Yesterday.mp3

[ohrenkino]

Filenames are no tags (metadata). They are filenames.
So what about the suggestion to harvest the existing data and start from there?

Also, there is a post in the FAQs:

Actions and batch-operations

How to remove/trim leading track numbers? Action type: Replace with regular expressions Regular expression: ^\s*\d+\s*-\s* Replace matches with: This regular expression removes the track number from 01 - Anything.. so that only Anything... remains. ^ matches the beginning of the string. Then any numbers of whitespaces \s* followed by numbers from 0-9. The \s*-\s* part removes the hyphen and any whitespace characters around it.

[LyricsLover]

@TagCenturio

All titles have a number in front of the title like:

There are two ways to save information:
a) You can name your files like 01 A hard days night.mp3
or
b) You can embed much more additional data inside your music files, like your TITLE or TRACK or ALBUM or ARTIST or cover pictures and many more

Example showing the filename and embedded metadata in Mp3tag
(embedded metadata is displayed by clicking on View -> Extended Tags)

The best approach is to complete your embedded metadata and then, if desired, rename your files.