Uninstall

Disable, keep the data

php bin/magento module:disable Webkul_InstagramFeed
php bin/magento cache:flush

Feeds stop rendering; accounts, posts, tags and analytics stay in the database, ready if you re-enable.

Remove everything

php bin/magento module:disable Webkul_InstagramFeed
rm -rf app/code/Webkul/InstagramFeed
php bin/magento setup:upgrade
php bin/magento cache:flush

module:uninstall only works for Composer-installed modules, so a file install is removed by deleting its folder.

That leaves the data in place. The module's tables — accounts, posts, feeds, product tags and analytics — are dropped only if you remove them yourself, or ask support for the teardown script. Back up first; it cannot be undone.

Leftover files

Mirrored images and video stay in pub/media/instagramfeed/. Remove the folder by hand to reclaim the disk space:

rm -rf pub/media/instagramfeed

Configuration values under webkul_instagramfeed/* remain in core_config_data unless you removed the data. They are harmless, and are reused if you reinstall.

See also