transferring a large movie file to dropbox

Hey there and welcome to Apple Support Communities tpencek,

We can certainly understand your concern and can help provide some insight.

We recommend checking out these steps on how to transfer files using a Mac or Windows PC, in order to upload the data to Dropbox.

" Intro to transferring files between your iPhone and computer

There are multiple ways to make files on your iPhone appear on your Mac or Windows PC, and vice versa.

• Wirelessly, with email, messages, or AirDrop: You can use email, messages, and AirDrop to send files to yourself from one device and download them on another. See Transfer files wirelessly between your iPhone and computer with email, messages, or AirDrop.

• Automatically, with iCloud: You can store your files, photos, videos, and more in the cloud where they automatically stay up to date on your iPhone and Mac or Windows PC. See Automatically keep your files up to date on your iPhone and computer with iCloud.

• With a cloud storage provider: You can store your files on a service like Box or Dropbox to make them available on both your iPhone and computer. See Share files between your iPhone and computer with a cloud storage service.

• With an external storage device: You can copy files to an external device, such as a USB drive or SD card, connected to your iPhone or computer. After disconnecting the storage device, you can connect it to your other device and copy the files to that device. See Transfer files between your iPhone and computer with an external storage device.

• With a file server: By connecting to a file server from your iPhone and your Mac or Windows PC, you can share files between them. See Use a file server to share files between your iPhone and computer.

• With the Finder or iTunes: After you connect your iPhone to your Mac or Windows PC with a cable, you can sync many types of data and transfer many types of files. See Sync content or transfer files between your iPhone and computer with the Finder or iTunes.

Each approach requires you to set up your computer to receive and send files, and each may have limitations on the items you want to transfer. "

For additional information, check out this link: Intro to transferring files between your iPhone and computer - Apple Support

These steps will help ensure your device is working with ease and can fix common issues like the ones you’re experiencing.

Kindest regards!