Its very useful functionality for upload all images from system directory [sys_file]
Drag n drop image functionality also available in flexform of typo3 6.2
Following should do the trick.
<images> <TCEforms> <label>Add images</label> <config> <type>inline</type> <appearance type="array"> <createNewRelationLinkTitle>Choose image from system directory.</createNewRelationLinkTitle> <enabledControls type="array"> <delete>1</delete> <dragdrop>1</dragdrop> <hide>1</hide> <info>1</info> <localize>1</localize> </enabledControls> <headerThumbnail type="array"> <field>uid_local</field> <height>45c</height> <width>45</width> </headerThumbnail> <useSortable>1</useSortable> </appearance> <behaviour type="array"> <localizationMode>select</localizationMode> <localizeChildrenAtParentLocalization>1</localizeChildrenAtParentLocalization> </behaviour> <filter type="array" /> <foreign_field>uid_foreign</foreign_field> <foreign_label>uid_local</foreign_label> <foreign_match_fields type="array"> <fieldname>rgsmoothgallery</fieldname> </foreign_match_fields> <foreign_selector>uid_local</foreign_selector> <foreign_selector_fieldTcaOverride type="array"> <config type="array"> <appearance type="array"> <elementBrowserAllowed>gif,jpg,jpeg,tif,tiff,bmp,pcx,tga,png,pdf,ai</elementBrowserAllowed> <elementBrowserType>file</elementBrowserType> </appearance> </config> </foreign_selector_fieldTcaOverride> <foreign_sortby>sorting_foreign</foreign_sortby> <foreign_table>sys_file_reference</foreign_table> <foreign_table_field>tablenames</foreign_table_field> <maxitems>100</maxitems> <minitems>0</minitems> </config> </TCEforms> </images>
it will look like below image.
If you have any queries, please do not hesitate to contact me at Jainish Senjaliya