Extract Parent ID of ContentNotes Object in Salesforce

To identify the parentID for Content Notes, you need to follow a two-step process

A. Extracting Content Notes IDs

1. Perform export using Data Export (Navigate to Setup and enter Data Export into Quick Find). For more, please review Export Backup Data from Salesforce and Data Export FAQ.
2. Select option Include Salesforce Files and Salesforce CRM Content document versions.
3. Deselect option Replace carriage returns with spaces. 
4. In object list, select ContentVersion and initialize the export.
5. When the file becomes available, download and unzip it. 
6. This export will contain a .csv file and a folder called ContentVersion. 
7. Open the 'ContentVersion' .csv file and it will contain details about all of the files. To filter only ContentNotes data, apply filter to column header in MS Excel by selecting data with following column values: IsLatest = 1, FileType = Snote.
8. Copy this data into another .csv file and save it. 

B. Extracting parent IDs of Content Notes

1. Open Data Loader and click on Export All.
2. Select the option Show all Salesforce objects and select the object ContentDocumentLink. 
3. Choose a target where the file will be stored. 
4. From the file generated  in process A step 8, select data that is present in column "ContentDocumentId," as this data will be used in the where clause of the query given in the next step.
5. Copy the query shown below and replace the value within parentheses with "ContentDocumentId" obtained from above steps, which will give you parent IDs and titles of Content Notes: 

6. The column "LinkedEntityId" will contain the parent record IDs and owner IDs for the Content Notes. Filter the data to show only record values.