Hey there!
It sounds like you need to check the size of your Burn Folder to make sure it's not too big to burn. Because the Burn Folder creates aliases to the content that you drag to it, you cannot use Get Info to do this so you would have to manualy add the size of the files together to approximate that. However another way to do this and get an accurate measurement is to create a disk image that you can burn which you can set for the size of your disc, and it even shows you at the top how much space you have left. This article will help you do that:
Disk Utility 12.x: Create a disk image
You can create an empty disk image, fill it with data, and use it to create disks, CDs, or DVDs. The disks you create can be formatted for Mac, Windows, and other types of computers. They don’t need to use the same format as your disk.
- Open Disk Utility, in the Utilities folder in Launchpad.
- Choose File > New > Blank Disk Image.
- Type a name for the disk image, and choose where you want to save it.
- In the Name field, enter the name for the disk that appears when you open the disk image.
- Choose the size of the disk image from the Size pop-up menu.
- Choose the format for the disk from the Format pop-up menu:
If the disk will be used with Mac computers, choose Mac OS Extended (Journaled).
If the disk will be used with Windows or Mac computers and is 32 GB or under, choose MS-DOS (FAT).
If the disk will be used with Windows or Mac computers and is over 32 GB, choose ExFAT.
- To require a password to use the disk image, choose an encryption option from the Encryption pop-up menu.
- From the Partitions pop-up menu, choose the partition scheme that best matches the type of disk you create.
- Choose “read/write disk image” from the Image Format pop-up menu.
- Click Create.
Disk Utility creates the disk image and mounts its disk on your desktop.
- In the Finder, copy your files to the disk, and then eject it.
- Restore the disk image to a disk, or burn it to a CD or DVD.
Restore a disk image to a disk
Burn a disk image to a CD or DVD
Thank you for using Apple Support Communities.
Take care,
Sterling