Receiving Error Trying to Import Products

[JessieSager]

Temporary Directory /home/heartpetsupply/public_html/admin/system/data/ is not writable! Please change permissions to proceed.

What does that mean?

[abantecart]

Set permissions on this directory to be writable for a web user.

Depending on your OS/hosting/configuration, you can do 775 or 777

[JessieSager]

Where do I set these permissions?

[Basara]

Where do I set these permissions?

Hello.
You can set file permissions for your AbanteCart files directly through your hosting control panel (like cPanel) or via an FTP client (such as FileZilla).