Wondering

After viewing photos/videos on a flashdrive plugged into the USB of an LG TV and using SmartShare to view... and then removing the USB and then no longer having access to the TV... I noticed on the flashdrive a new folder called "LG TV" and within what appears to be files that may have been the thumbnails displayed on the TV. My question is... do those thumbnails also remain on the TV as "recently viewed" history even without the USB plugged in? The LG Smart TV online user guide refers to "Recent" ("To view a list of recently viewed or added content, select Recent). Would thumbnails be there without the source flashdrive?

After viewing photos/videos on a flashdrive plugged into the USB of an LG TV and using SmartShare to view... and then removing the USB and then no longer having access to the TV... I noticed on the flashdrive a new folder called "LG TV" and within what appears to be files that may have been the thumbnails displayed on the TV. My question is... do those thumbnails also remain on the TV as recent history even without the USB plugged in? The LG Smart TV online user guide refers to "Recent" ("To view a list of recently viewed or added content, select Recent). Would thumbnails be there without the source flashdrive?