Attached files, where are they saved?

For example, in the documents module or the notes module we can attach files.

But when you want to export the information from these modules, you can only create a file with a csv extension, but the attached files (jpg, png, pdf, xls, doc) remain in the system.
Where do I have to look to recover them?

Thank

The SuiteCRM has documents table in the DB. If I am not wrong there files are stored in the encrypted format in the DB as well as in the upload folder of the SuiteCRM.

upload
The upload folder contains documents that have been uploaded to SuiteCRM. The names of the files comes from the ID of the matching Document Revision/Note. upload /upgrades will also contain various upgrade files and the packages of installed modules.

I blogged about this with some detail, see here

There are other similar posts there about storage of photos, images, emails, etc