A spreadsheet can already be a personal movie tracker. It may begin with five columns: title, year, date watched, a rating, and a note. You add a film after dinner, sort by date, and find it again. For a while, that is all you need.
A movie spreadsheet is useful when you want control over columns, sorting, and a file you can copy. Try an alternative when adding a film or finding an old note takes more work than you want. Test a few entries in a notebook or collection app, check whether it handles posters and notes, and keep the spreadsheet until the new place works for you.
Notice where the extra work begins
One evening you remember a scene but not the title. You search a column of titles, open several rows, then discover the sentence you want is in a different file. A sheet can handle this if you set it up well. The question is whether you want to keep maintaining that setup.
Look at your last three entries. Did you write down what mattered, or spend the time fixing dates, names, and formatting? If the latter is becoming routine, change the smallest part of the process first. A wide note column or a link to a separate page might be enough.
Test the things a grid does well
A spreadsheet makes your own fields visible. You can sort rewatches, filter a year, and keep a copy of the file. A gallery app may show posters more readily, but that does not make its notes easier to find or its data easier to move. Write the same three films in both places and compare the ordinary tasks you actually do.
Try finding a note by a word from the sentence rather than by title. Change a film's viewing date. Add a second viewing without erasing the first. Then see whether a poster helps you remember the film or simply makes the page look finished.
Choose a second place with care
A paper notebook gives a thought plenty of room, though it cannot search for you. A note app may be quicker to write in; check where it syncs and how to export. A film community offers discovery and conversation. If you want a Windows collection for films alongside games and music, Curatale is one option to inspect. Check its current features and terms before moving your records.
Do not assume that an app fetches every poster or imports a spreadsheet because its gallery looks complete. Enter a few titles yourself. See which images appear, where you can correct a match, and how a personal note is saved.
Move three films before you move a collection
Save a copy of your spreadsheet. If you export it as CSV, open that file and check which columns are present. CSV carries text fields, not the entire look of a workbook. Ask the new tool what it can import; if it cannot import the file, copying three entries by hand will show you how much work a larger move would take.
Keep the original until you can find those three films and their notes in the new place. If the sheet still makes the next viewing easier to remember, keep using it. You can try another way of keeping films without throwing out a record that already works.