In order to bulk upload to OpenSea your NFTs, you'll first have to upload them to IPFS and use a pinning service to be sure that your NFTs will be always accessible.
Upload your NFTs to nft.storage
1. Create nft.storage Account
nft.storage is free for up to 31 GB of space. Please, start by creating your nft.storage account.
2. Start Upload Process
3. Upload .car file to nft.storage
3.1 Directly from nft.storage website
Upload the .car file downloaded from our platform.
This could take a while, depending on the size of your .car file.
3.2 Using the desktop application NFT Up
If you are going to use NFT UP, the nft.storage desktop application, you will have to upload the assets directly from your computer, and not use the .car file provided by KoalaMint.
Just select your assets files from your computer and upload them.
4. Copy the Folder URL
5. Paste nft.storage folder URL into the platform
Paste the URL copied from nft.storage into the platform.