Bulk Upload files and meta data from file share into sharepoint online doclib

Hi smaharms-wende ,

I would use the SharePoint Migration Tool  (https://spmt.sharepointonline.com/install/default.htm ) to upload the files themselves (This handles uploads of bulk data very well).

Then i would store all the metadata in a CSV file and use PnP PowerShell to update the metadata of the files

#Url;Doclib;Title;Othervalue
#/sites/mysite/Documents/Document.docx;Documents;New Title;New Othervalue
$CSVData = Import-CSV $filepath

Connect-PnPOnline https://yourtenant.sharepoint.com/sites/mysite -Interactive

$CSVData |foreach-object {
    $item=Get-PnPFile -Url $_.Url -AsListItem
    Set-PnPListItem -List $_.Doclib -Identity $item.Id -Values @{Title=$_.Title;Othervalue=$_.Othervalue}
}

Best Regards,
Sven

smaharms-wende 

Are the metadata fields present as properties within the image files or in a separate file / system?
In case the metadata fields are present within the image files you can use tools to upload the images and automatically extract the metadata. See https://directory.collab365.com/listing/slim-companion-explorer/.