How to Do a Conditional find, move & delete the empty folders in one string command ??

[Flourgrader]

Hello All,
I am using Everything 1.5 Alpha.....
I could do with a little bit of help here!
I want to work from the root folder down through the sub folders
I am sorting my music collection
which consists of 3,511 folders and 35,852 files
If there is less than 3 files in a folder
regardless whether they are *.flac or *.mp3 or cover album pics
I want to move these files into a central folder called "MixedMusic"
After I have done that I want to delete the empty folders the files resided in!
I know how to get as far as finding all the folders I want to work on by
using the command "descendant-count:<3"
I don't know how to complete the rest of the task?
Could some kind soul give me the string command that would
complete this task ?
Thank you guys & dolls..

[void]

I want to move these files into a central folder called "MixedMusic"

With your

descendant-count:<3

search, select all the files and move them to your MixedMusic folder.

Consider using Edit -> Advanced -> Advanced Move to preserve parent folder names.
For example:

Uncheck Regular expressions.
Old format:

C:\My Music\%1

New format:

C:\MixedMusic\<regexreplace:%1,"\\","_">

where C:\My Music is your music folder.

As example, this will move files from:
C:\My Music\folder1\folder2\folder3\file.mp3
to:
C:\MixedMusic\folder1_folder2_folder3_file.mp3

Advanced Move

After I have done that I want to delete the empty folders the files resided in!

To delete empty folders in C:\My Music, please search for:

"c:\my music\" empty:

Select all folders.
Press Alt + Enter.
Double check there are no files are found. (in case you are excluding files or folders from your Everything index)
Delete the empty folders.

empty:

[Flourgrader]

Thank you David, your working example, it worked perfectly,
I am not very good with RegEx Code.
If I did not want to preserve the parent folder names
in the Target folder how would I express that ?
I would like it to look like:
Folder: MixedMusic
Files: all single files in here without parent folders ?
TY

[void]

If I did not want to preserve the parent folder names
in the Target folder how would I express that ?

Cut all the files from Everything and paste them in your Mixed Music folder in Windows Explorer.

[Flourgrader]

Thank you David for the advise.
Yes that is what I have done...