Use case: upload Pascal VOC format

Step 1. Download PascalVoc segmentation dataset

Step 2. Unpack archive

Step 3. Directory structure have to be the following:

.
├── ImageSets
│   └── Segmentation
│       ├── train.txt
│       ├── trainval.txt
│       └── val.txt
├── JPEGImages
│   ├── 2007_000032.jpg
│   ├── 2007_000033.jpg
│   ├── ...
├── SegmentationClass
│   ├── 2007_000032.png
│   ├── 2007_000033.png
│   ├── ...
└── SegmentationObject
    ├── 2007_000032.png
    ├── 2007_000033.png
    ├── ...

Step 4. Choose all (four) subdirectories and drag and drop them to browser.

Directory content instead of parent directory

If you will drag and drop parent directory instead of its contents, import will crash.