How to save multiple Histogram from 1 database into 1 otuput folder?

I wanna call all images in database and all of them have output in histogram the after that I wanna save them into 1 output folder but I got an error for this code:

Images=dir('D:\DIAH\[MATLAB]cv1-fingerspelling-recognition-master\cv1-fingerspelling-recognition-master\imagesss\'); %Database Image folder
%......................[] ^ IS this OK?
for k = 1 : length(Images)
  baseFileName = Images(k).name;
  fullFileName = fullfile(Images(k), baseFileName);
  methodFile = imread(fullFileName);
  grayscale = rgb2gray(methodFile);
  histogram = imhist(grayscale);
  currentImageArray = grayscale;
  currentImage{k}=currentImageArray;
end
for i=1:1
outputFolder = 'D:\DIAH\[MATLAB]cv1-fingerspelling-recognition-master\cv1-fingerspelling-recognition-master\Hasil Histogram Dataset\1';
% outputFileName = fullfile(outputFolder, ['Hasil Citra Lab_' num2str(i) '.jpg']);
outputFileName = fullfile(outputFolder, sprintf('Hasil Citra Ground Truth_%d_%d.jpg', k, i));
imwrite(currentImage{k}, outputFileName);
end

[KALYAN ACHARJYA]

Duplicate question

https://in.mathworks.com/matlabcentral/answers/474206-how-to-save-histogram-of-multiple-images