diff --git a/app/src/main/res/drawable-v21/saf_guide_1.png b/app/src/main/res/drawable-v21/saf_guide_1.png
deleted file mode 100644
index 131ddc5e..00000000
Binary files a/app/src/main/res/drawable-v21/saf_guide_1.png and /dev/null differ
diff --git a/app/src/main/res/drawable-v21/saf_guide_1.webp b/app/src/main/res/drawable-v21/saf_guide_1.webp
new file mode 100644
index 00000000..33311d71
Binary files /dev/null and b/app/src/main/res/drawable-v21/saf_guide_1.webp differ
diff --git a/app/src/main/res/drawable-v21/saf_guide_2.png b/app/src/main/res/drawable-v21/saf_guide_2.png
deleted file mode 100644
index be7fdb78..00000000
Binary files a/app/src/main/res/drawable-v21/saf_guide_2.png and /dev/null differ
diff --git a/app/src/main/res/drawable-v21/saf_guide_2.webp b/app/src/main/res/drawable-v21/saf_guide_2.webp
new file mode 100644
index 00000000..ab3d8655
Binary files /dev/null and b/app/src/main/res/drawable-v21/saf_guide_2.webp differ
diff --git a/app/src/main/res/drawable-v21/saf_guide_3.png b/app/src/main/res/drawable-v21/saf_guide_3.png
deleted file mode 100644
index 18fcccfb..00000000
Binary files a/app/src/main/res/drawable-v21/saf_guide_3.png and /dev/null differ
diff --git a/app/src/main/res/drawable-v21/saf_guide_3.webp b/app/src/main/res/drawable-v21/saf_guide_3.webp
new file mode 100644
index 00000000..01c7f461
Binary files /dev/null and b/app/src/main/res/drawable-v21/saf_guide_3.webp differ
diff --git a/app/src/main/res/drawable-v26/saf_guide_1.png b/app/src/main/res/drawable-v26/saf_guide_1.png
deleted file mode 100644
index 1ad76c68..00000000
Binary files a/app/src/main/res/drawable-v26/saf_guide_1.png and /dev/null differ
diff --git a/app/src/main/res/drawable-v26/saf_guide_1.webp b/app/src/main/res/drawable-v26/saf_guide_1.webp
new file mode 100644
index 00000000..5b97278b
Binary files /dev/null and b/app/src/main/res/drawable-v26/saf_guide_1.webp differ
diff --git a/app/src/main/res/drawable-v26/saf_guide_2.png b/app/src/main/res/drawable-v26/saf_guide_2.png
deleted file mode 100644
index 32fee2ed..00000000
Binary files a/app/src/main/res/drawable-v26/saf_guide_2.png and /dev/null differ
diff --git a/app/src/main/res/drawable-v26/saf_guide_2.webp b/app/src/main/res/drawable-v26/saf_guide_2.webp
new file mode 100644
index 00000000..367446a1
Binary files /dev/null and b/app/src/main/res/drawable-v26/saf_guide_2.webp differ
diff --git a/app/src/main/res/drawable-v26/saf_guide_3.png b/app/src/main/res/drawable-v26/saf_guide_3.png
deleted file mode 100644
index d0e28be7..00000000
Binary files a/app/src/main/res/drawable-v26/saf_guide_3.png and /dev/null differ
diff --git a/app/src/main/res/drawable-v26/saf_guide_3.webp b/app/src/main/res/drawable-v26/saf_guide_3.webp
new file mode 100644
index 00000000..653a8bde
Binary files /dev/null and b/app/src/main/res/drawable-v26/saf_guide_3.webp differ