Salesforce files are optimized for Lightning Experience. Attachments can’t be uploaded in Lightning Experience. Attachments may be visible (and read-only) in Lightning Experience, but only if the org admin has enabled this on each page layout.
Enhanced notes are more versatile and provide better functionality than classic notes. Classic notes can only be attached to the records of one object. Enhanced notes, however, can be added to multiple objects, like accounts, opportunity, contact, and lead. Enhanced notes are optimized for Lightning Experience. They can also be used in Salesforce1.
This package includes 3 tools:
Conversion of attachments and notes is supported for custom objects and the following standard objects: Account, Asset, Campaign, Case, Contact, Contract, Lead, Opportunity, Product, Quote, and Solution.
Convert attachments to files because files are optimized for Lightning Experience and provide additional capabilities beyond attachments, including the ability to relate files to multiple records, track multiple versions, and view file previews.
Convert classic notes to enhanced notes, which are optimized for Lightning Experience and provide additional capabilities beyond classic notes, such as the ability to relate a note to multiple records, and track multiple versions
If you have comments or feedback, please reach out to us in this Success Community Group: https://success.salesforce.com/_ui/core/chatter/groups/GroupProfilePage?g=0F93A000000LgpS