A USB drive can have plenty of free space and still reject one large wedding video. Check its file system as well as capacity. FAT32 has a single-file size limit of approximately 4 GB; Western Digital describes file-system considerations in its My Passport manual. This explains a possible copy failure, but it does not prove that a different format will work on the venue's player.
Confirm the failure without changing the drive
Read the video's actual byte size in file properties. Inspect the USB volume's file system and available capacity. Record the error message. If the drive uses FAT32 and the file exceeds its limit, the problem is not solved by deleting unrelated photographs to free more space.
Keep the existing drive contents intact. Formatting removes files, so do not use it as the first diagnostic step. If the drive already contains family material or venue assets, create and verify a separate backup before any authorized format change. Prefer another suitable drive when that avoids disturbing the original.
Match the delivery method to the player
Ask the venue for the actual playback device model and supported USB file systems. A laptop and a hotel television may accept different formats. Confirm video and audio support as a separate requirement; a drive that mounts successfully can still contain an unsupported movie.
For a hypothetical delivery, a 6 GB wedding film cannot be copied as one file to a FAT32 volume, even with 40 GB free. A drive using a compatible file system may solve copying, but only a test on the intended player establishes playback. These sizes are assumed examples, not measurements of your project.
If the device requires FAT32, discuss another playback route or an approved smaller export. Re-encoding can reduce size but may affect picture or sound quality. Splitting the film creates a presentation interruption and should be agreed with the event operator. Do not simply rename several pieces and hope they play continuously.
Complete a practical handover
Copy the chosen delivery file, safely disconnect the drive and reconnect it to the intended player. Test the opening, a middle section and the ending, including sound. Keep the original high-quality export separately and label the event copy clearly.
Acceptance includes successful copying, reliable playback and preserved existing material. It does not follow from the free-space number alone. For a project from Imagild Film Studio, establish the venue's storage and playback requirements before the final export becomes the only available event copy.