How do I import multiple files from multiple folders?

I am trying to import data from multiple text files spread out between multiple folders. In this example of a previous question, what could I do to grab data from every file in each folder, rather than just one particular file?

% Path of the main folder : Rotation
yourpath = 'H:\Inspection ProjectData\rotation1';
% Get all the subfolders
ContentInFold = dir(yourpath);
SubFold = ContentInFold([ContentInFold.isdir]); % keep only the directories
% Loop on each folder
MyData = [];
for i = 3:length(SubFold) % start at 3 to skip . and ..
  filetoread = fullfile(yourpath,SubFold(i).name,'fx.txt'); % <- this is the "fx.txt" file of the ith subfolders
  % then type your code to read the text files and store in one variable
  fileID = fopen(filetoread);
  MyData{end+1} = textscan(fileID,'%s\n'); % the format depends of your files
  fclose(fileID);
end